The Ultimate BMW G87 M2 Modding Guide

Last updated: 30 September 2026

The G87 M2 is probably the last small BMW M car of its kind. Petrol, straight-six, twin-turbocharged, rear-driven, and still available with three pedals. Everything around it is getting heavier, quieter and more electric. The M2 sits a little apart from all that, and it's a car people will still want in fifteen years. So build it like that's true.

The trouble is that the M2 attracts two kinds of advice in roughly equal measure: breathless hype and forum folklore. Neither is much use when you're about to spend real money. This is the honest version. It covers every version of the car, what to buy, what to leave alone, and how to build one in the right order.

Start with the foundations, not the headline parts. Protect the car, then sort tyres, brake pads, fluid and alignment, then suspension and wheels, then aero, and only then chase power. Each step decides what the next one needs. Wheels decide how low you can go, ride height decides which aero survives a speed bump, and power decides what your brakes and tyres have to cope with. Build out of order and you pay twice.

Nathan picked his car up as a standard manual LCI and started modifying it straight away. It's a good example of a sensible first stage done properly.

The BMW G87 M2 at a glance

Every G87 M2 version explained

The G87 launched in 2023 and should stay in production until around 2029. Across that life there are four versions worth knowing apart, and the differences matter more for modifying than the badges suggest.

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Power in metric horsepower (PS), as BMW UK quotes it. Weights are DIN, which means without a driver.

What LCI means

LCI stands for Life Cycle Impulse, BMW's name for a mid-life refresh. On the G87 the changes are unusually light: refreshed badging, a move from iDrive 8 to 8.5, a new steering wheel, 20 hp more from the same engine, and new paint and wheel colours. The change that matters most to buyers is quieter. The Carbon Fibre roof and interior trims, once standard, became options, so check the spec of any LCI car rather than assuming.

The M2 CS

The focused one. It makes 530 hp, sheds around 30 kg through extra Carbon Fibre, sits roughly 8 mm lower and gets revised springs, dampers, steering and differential. It's automatic and rear-drive only, built as a limited run, and rides on wheels shared with the M4 CS and CSL. It's the closest thing to a factory track-bred G87, and it's no longer available to order new.

The M2 xDrive

The headline figure misleads people. The xDrive makes the same 480 hp as the rear-drive LCI car, so it isn't a power model. The story is traction. Its configurable M xDrive system and Active M Differential cut the 0 to 62 mph time to 3.7 seconds, three tenths quicker than the rear-drive automatic. It's automatic only, around 60 kg heavier, costs from £74,255, and has been built since August 2026. The rear-drive M2, manual included, carries on alongside it.

From mid-2026, BMW is also introducing its M Ignite pre-chamber combustion across its M straight-six engines, starting with the M2 xDrive. If your car was built from mid-2026, check that your tuner specifically supports your engine before you book anything.

How does the G87 compare with the F87 M2?

The G87 is around 200 kg heavier than the F87 M2 it replaced. When it arrived, that was the main complaint, and it was a fair one for a car meant to be the small, light M car. Then people drove it. It's faster, more composed and more usable than the F87, and the LCI car has more power for every tonne it carries than an F87 M2 Competition did.

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Manufacturer figures. Weights are BMW DIN figures, without a driver. F87 weights are converted from BMW's EU figures by removing the standard 75 kg driver allowance.

The extra weight shows in the places it always does: tyres, brakes and how eagerly the car changes direction. It also changes the maths on modifying, which is why spring rates, pads and cooling come up again and again in this guide. What it doesn't do is stop the G87 being a brilliant car to build.

Buying a G87 M2 to modify

Engine

There's one engine: the 3.0-litre twin-turbo S58, shared with the M3 and M4. Output changes with the version, not the hardware. It's strong, well understood, and has plenty of headroom for tuning.

Manual or automatic?

The rear-drive M2 comes with a 6-speed manual or an 8-speed ZF automatic. The CS and xDrive are automatic only.

The manual is the choice for engagement, purity and resale to driving enthusiasts. The catch is a hard torque ceiling: it won't survive the torque a seriously tuned S58 makes, so it caps a big-power build long before the engine does. The automatic is faster, smoother and more flexible. Gearbox flashes, using GTS or CS coding or a tuner solution like XHP, sharpen the shifts and can extend gearbox life on high-power builds by reducing clutch slip.

Rear-wheel drive or xDrive?

Suspension

Every G87 leaves the factory on adaptive dampers, and they're genuinely good. Before you reach for coilovers, be clear about why. Most people swap them for stance and height, not because the dampers fall short.

Options worth having

The G87 comes well equipped, so there are very few true must-haves. On a used car, chase the Carbon Fibre bucket seats, which give real support and a real weight saving and are a pain to add later, and the Carbon Fibre roof, which is standard on pre-LCI cars and optional on LCI cars. Active Cruise Control is a small thing that makes a big difference on a car that sees motorways. Carbon-ceramic brakes are superb, but expensive to buy and to live with, and can be grabby when cold. Unless the car genuinely sees hard track use, steel brakes with the right pads are the smarter call.

Buying used: what to check

By performance car standards, the G87 is remarkably solid, with no widespread horror stories. There are still a few known quirks worth knowing before you put down a deposit.

• iDrive screen rattle. Well documented and easily sorted with foam packed behind the screen.
• Exposed front radiators and oil cooler. They take stone strikes, so protect them early with an oil cooler guard and mesh grilles from Zunsport.
• A knock or creak from the front. A knock through the wheel at low-speed full lock, or a creak over rough ground, points to BMW's SIB 32 01 23, caused by too much breakaway torque in the tie-rod thrust bearing. BMW paused M2 tie-rod replacements pending an updated part, so a noisy car is a dealer conversation. On a modified car, rule this out before you blame your new coilovers.
• The running-in service. At roughly 1,200 miles, BMW drains the dedicated running-in oil to flush out the fine metal a new engine sheds. If it was skipped or delayed, negotiate hard or walk. You can't un-skip a break-in.
• Signs of a hard life. Interior wear should match the mileage. Empty holes under the bumper or skirts, bootlid damage from an old spoiler and marked bolts in the engine bay all tell you parts have been on and off. None of it is automatically a dealbreaker, but all of it should shape the price.

Running costs

BMW runs the M2 on condition-based servicing, with oil services typically around every 10,000 miles or 12 months. Hard-driven and tracked cars benefit from shorter intervals, and plenty of specialists change oil more often than the indicator asks. Brake fluid is every two years, and the bigger services bring the air filter and spark plugs at around 40,000 miles. The S58 holds roughly 7 litres of a BMW-approved 0W-30 class oil, and consuming up to around a litre per 1,000 km under hard or track use is within BMW's tolerance.

The hidden costs are the ones that never appear on a finance quote. The M2 eats rear tyres, the exposed nose needs PPF, and once you start modifying, labour and alignments quietly follow most jobs. It's cheap to keep for how fast it is. It's how you use it that costs you.

The best spec to start with

For a big-power build, buy an automatic. For a driver's build, buy the manual rear-drive car, no apology needed. Either way, chase the Carbon Fibre roof and buckets if you want them, and be wary of a cheap car with patchy history or signs of removed mods. A clean, honest, slightly dearer car is almost always cheaper in the end.

Before you modify anything

The most valuable hour of any build happens before a single part goes on. Work through this on the standard car first.

Keep every original part you take off, boxed and labelled. OEM parts in the loft are worth real money later, and they let you return the car to standard in an afternoon. Fit PPF before aero, so the film sits under your splitter line rather than ending at it. And update your insurance before the parts go on, not after. An undeclared mod is an unpaid claim waiting to happen.

The right order to modify a G87 M2

There's no single correct order. It depends on what you want. Find where you are in each profile below, and the shape of your build starts to appear.

The classic out-of-order mistakes are easy to spot: a wing before a splitter, lowering before the wheels and arch clearance are sorted, and chasing power before brakes and tyres.

Be honest about the car's main job, too. A daily values ride quality and a finish that survives British roads. A show car chases impact and accepts the compromises. A track car is ruthless about weight, cooling, braking and consumables. The usual mistake is building a show car you meant to track, or a track car you then have to drive every day.

Decide which tier you're honestly building to before you start, and resist the slow drift from one into the next without a plan. That drift is where budgets quietly double.

G87 M2 mod paths

Think of these like factory option packs: ordered routes to a clear end result. Each step assumes the one before it.

OEM+: looks like BMW could have built it

1. Protect: PPF, baseline alignment and an oil cooler guard.
2. Subtle aero: a gloss black or Carbon Fibre boot lip and diffuser.
3. Stance: quality lowering springs and modest spacers, then re-align.
4. Sound: a mid-pipe to the OE back box, with a valve controller.
5. Wheels: tasteful OE-style or forged wheels in the correct offset.

Fast road: sharper everywhere, still usable

1. Supporting mods first: fast-road pads, braided lines, good fluid and bushings.
2. A sensible Stage 1 to 2 tune with downpipes, intake and a full exhaust with valve control.
3. Road-set coilovers, a fresh alignment and an arch clearance kit if needed.
4. Sticky but liveable tyres, such as a fast-road and track hybrid.

Track and Nürburgring: repeatable pace and reliability

1. Brakes and fluid first, then cooling margin before more power.
2. Geometry: a track alignment, a square wheel setup and CS or CSL coding.
3. Bucket seats, fitted with the safety systems sorted.
4. Aero balanced front to rear, and tyres chosen for the surface.
5. Only then more power, with the fuelling and cooling to survive it.

UK daily: built for potholes, weather and speed bumps

1. A conservative ride height, with no deep splitters or extreme drops.
2. Quality summer or all-season tyres, and sensible offsets to avoid kerb rash.
3. A quiet exhaust with valve control.
4. PPF everywhere the road throws stones.

Show: individuality is the point

1. Commit to one coherent theme. Mismatched aero is the giveaway.
2. Pre-preg Carbon Fibre over cheap parts that haze and crack.
3. Wheels and stance to suit the kit, with arch work done properly.
4. Accept the daily compromises a show stance brings.

Budget first: the most change per pound

1. Pads, fluid and an alignment. This alone wakes the car up for little money.
2. A single mid-pipe to the OE back box, with a valve controller.
3. Lowering springs and a modest spacer set.
4. One tasteful Carbon Fibre accent rather than a half-finished kit.

Reliability first: longevity over headline numbers

1. Shorter oil intervals, quality consumables and cooling margin.
2. A gearbox flash to reduce clutch slip on the automatic.
3. A conservative tune, well inside the limits of the standard hardware.
4. Reversible, declarable mods only, to protect warranty and resale.

The mods that almost never disappoint

If you want the safest, most resale-friendly upgrades, start with a valve-controlled exhaust, fast-road pads with braided lines and quality fluid, control arm and steering rack bushings for the steering feel the car lacks, quality lowering springs with a proper alignment, a subtle Carbon Fibre boot lip and diffuser, and tasteful forged wheels in the correct offset.

Styling and aero

The G87's slab-sided, heavy-nosed design splits opinion, and that's an opportunity. The right aero adds the tension the factory shape is missing. The wrong aero fights it. The best cars wear parts that look like they could have left the factory that way, or commit fully to one coherent, more aggressive theme. The worst wear a bit of everything.

Materials

Most quality parts come in Carbon Fibre or plastic, either ABS Plastic or FRP. Carbon Fibre is lighter and stiffer and allows more ambitious shapes, but costs more. ABS Plastic and FRP are cheaper and easier to repair or repaint, but heavier and less refined. Within Carbon Fibre there are three grades:

• Wet lay. The cheapest, fine for cosmetic parts, but it can show weave inconsistencies.
• Pre-preg Carbon Fibre. Autoclave-cured, with a consistent weave, the best strength-to-weight and the UV-stable finish an exterior part needs. This is the standard to build to.
• Mixed composites. Carbon Fibre with fibreglass, a cost-conscious middle ground. Just know what you're buying.

Front end

Front parts make the biggest difference to how aggressive the car looks, and the biggest difference to how usable it is. A good front splitter settles the front at speed and visually drops the nose, but costs you ground clearance and changes every approach angle you meet. If the car lives in town among steep ramps and speed bumps, think hard. Canards are mostly for looks at road speeds. Lips and most splitters take a couple of hours to fit, and the centre and side air ducts are the awkward exception.

Side profile

Side skirts visually lower the car and tie the front and rear together. They're often the missing link that makes a half-built car finally look finished, and they're usually a straightforward fit. Watch jacking point access, though. Some designs sit over or near the factory jacking points, so make sure you can still get the car safely in the air.

Rear end

The rear sets the tone of the build, whether that's subtle, performance-inspired or full theatre. You have three levers: the diffuser, the boot spoiler and, at the extreme, a wing. Choose them as a set, not in isolation.

• Diffusers. In Carbon Fibre from Genuine M Performance, TREVORA, ADRO, Alpha-N, Vorsteiner and 3D Design, or gloss black from ZAERO Design and Maxton. Performance designs sit under the exhaust and extend forward to work the airflow rather than just dress the rear.
• Boot lip spoilers. The same Carbon Fibre names, with gloss black from ZAERO Design and Maxton.
• Wings. For a committed, track-leaning look, the names to know are Alpha-N, TREVORA and Vulcan Alpha. A wing is the biggest statement you can make at the back, and the hardest to pull off tastefully.

Full body kits

A full kit changes the car completely, but it's a commitment: to cost, to daily compromise and to getting the install right. Done well, nothing else has the same effect on a G87. Done cheaply, it shows. Most body parts go on without major disassembly, but plan extra time for the front air ducts, rear wings, which need backing plates, careful alignment and sometimes drilling, and some rear diffusers, where exhaust and sensor clearance complicate the fit. Expect to recalibrate the parking sensors and possibly the front camera after a bumper comes off. And declare your mods: badly fitted parts can void your cover.

Our own TREVORA TR87 kit is built around exactly these principles: Pre-preg Carbon Fibre, a single coherent design, and downforce balanced at both ends. PistonHeads reported that the V3 version makes 108 kg of downforce at 120 mph, split evenly front to rear. The TR87 Track Pack takes it further, with an adjustable wing and a deeper splitter lip.

The TR87 kit, fitted on a customer car

When the G87 landed, plenty of people loved how it drove and hated how it looked. We were in that camp too. The nose is heavy, the flanks are slab-sided and the back is squared off, and parked next to an F87 M2 Competition it loses the beauty contest every time.

So we did something about it. Straight after launch we spent six months working with TREVORA on a kit for the car. Our own shop car was 3D-scanned, the parts were designed around that data, and every piece was test-fitted on a real G87 before it went on sale. The result is the TR87 kit.

Winged or flat

There are two visual paths in the same family. The winged look has upturned edges on the splitter, skirts and diffuser winglets, and pairs with a full rear wing. The flat Low-Line path is closer to OEM+, with a cleaner lower line and a spoiler lip instead of a wing, for owners who want the shape fixed without the theatre. The car in our film, a customer's M2 belonging to Ben, got the winged look.

If you go winged, remember the rule from the section above: a wing wants a splitter to balance it. The TR87 winged splitter carries its own winglets for exactly that reason, and the side skirts are shaped to run the line from the splitter back to the rear winglets.

What's in the kit

• Front splitter with winglets. Three pieces, so it ships safely and a damaged section can be replaced on its own rather than buying a whole new splitter. It bolts to the OEM mounting points.
• Winged side skirts. The link between front and rear.
• Rear diffuser and rear bumper winglets. Replaces the plain gloss black factory diffuser, which does nothing for big exhaust tips.
• Rear wing on metal legs. The legs have two settings, road and track. Road sits the blade flatter; track adds rake for a more aggressive look. Ben's car went on in road mode, with the option to switch to track later.
• Front air ducts with fins that nod to the F87 M2's bumper, plus the TR87 Front Bumper Centre Trim to replace the gloss black original in the lower centre of the bumper.

Every part is 2x2 twill Pre-preg Carbon Fibre, so the weave sits happily next to BMW M Performance carbon if you already have some. On Ben's car the splitter weave lined up neatly with the centre trim, which is the kind of detail that separates a coherent kit from a pile of parts.

You can buy the TR87 carbon body kit, the flatter TR87 Low-Line carbon kit, or the TR87 Track Pack (deeper splitter and wing as a pair). The main aero pieces are also listed on their own if you want to build up piece by piece.

Fitting it

Most of the kit is a straightforward workshop job:

• Splitter: OEM mounting points, so no drilling. Follow the snug-not-tight advice above.
• Diffuser: clips all the way round. It needs a firm hand coming off and going on, but there are no fixings to fight. The winglets use existing OEM mounting holes.
• Side skirts: easiest with the car down on ramps rather than up on a lift.
• Rear wing: the one part that needs drilling. The boot lining comes out and holes are drilled through the boot lid for the wing legs. TREVORA supplies templates, which takes the guesswork out of measuring, but it is permanent, so most owners will want it professionally fitted.
• Front ducts and centre trim: bumper off. That is also the moment to fit a magnetic plate kit if you want one.

Small extras

Front plates do the G87's face no favours, and unscrewing one for every show gets old. We worked with Plateless on a G87 magnetic front plate kit so the plate pulls on and off. It is easiest to fit while the bumper is off for the ducts.

The verdict on Ben's car

The man who opened the film saying everyone hated the G87 closed it with: "I take back everything I said earlier about the G87." The kit fixes the two things that bother people most, the plain front and the squared-off rear, while keeping the car recognisably an M2. If the factory shape is the only thing stopping you buying one, this is where we'd start.

Performance mods: exhaust, intake, tuning and cooling

The S58 takes to tuning brilliantly, which is exactly why restraint matters. Power is the easy part. Making it survive is the build.

Exhaust

For most owners the exhaust is the first performance mod, because it changes the car's character more than any single part. An axle-back replaces the rear section, a cat-back replaces everything behind the cats, and a full system includes the downpipes. The further forward you go, the bigger the change in sound, potential power and legality.

Removing the petrol particulate filter or the cats frees up sound and flow, but in the UK and EU it's track only. It isn't road legal, it'll fail an emissions test, and tuning can hide the fault codes without making the car legal.

Drone is the resonant boom at cruising revs, and stripping the centre resonators on top of the cats is what tips most cars into it. For any system with upgraded cats or a mid-pipe, fit a valve controller. It keeps the peace when you need it and opens up when you want it. On a budget, a single mid-pipe to the OE back box is the move. The most popular setup is a mid-pipe to a quality back box from Milltek. With no budget limit, high-flow cats with a premium system like Akrapovič. Browse our G87 M2 exhaust systems, and choose by how much drone you can live with, not how it sounds in a revving video.

Intake

Intakes do two jobs, and people mix them up. The power comes from upgraded turbo inlets. The sound comes from the intake cones, which the factory deliberately silences. Eventuri is the popular choice for good reason, and Pro Ram covers the budget end. The internet will tell you open intakes kill power through heat soak. On a road car the effect is small and intermittent, so choose between open and enclosed designs on sound versus consistency, not folklore.

Tuning

A flash tune rewrites the factory ECU: cleaner, more integrated, and the most control. A piggyback modifies the signals going to it: easier to fit and remove, which some owners value for warranty and resale, but generally less sophisticated.

Cooling

For most builds, factory cooling is enough, including Stage 1 and Stage 2 on the road. It becomes essential at very high power and in racing. The real exception is the Stage 2 track day car in summer heat. That's where the standard system runs out of margin, and uprated cooling earns its place. For everyone else, adding it to be safe is usually money better spent elsewhere.

Brakes and bushings

The standard discs and calipers are excellent. The weak link is the pad. Fast-road or track pads, braided lines and uprated fluid will do more for how the car feels than most things you can bolt on, with no power gain and no warranty drama. Bed new pads in properly, with a series of progressively harder stops from speed and then a cool-down, or you'll glaze them on the first hard stop. If the steering feels numb, and plenty of owners say it does, control arm and steering rack bushings give real feel back. It's one of the most underrated upgrades on the car.

Wheels, tyres and stance

The G87 uses a 5x112 mm PCD, a 66.6 mm centre bore and M14x1.25 bolts. That's a change from the 5x120 mm pattern and 72.6 mm bore of older BMWs, so earlier wheels won't bolt on, and any spacers have to be hubcentric to 66.6 mm.

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There's reasonable room to play with aftermarket sizing, but treat fitment and ride height as one decision. A lower offset pushes the wheel outwards for a flush look, and too low an offset makes it catch, especially once the car is lowered. The Apex fitment guide is the reference the community trusts, so cross-check any setup against it before you order, and work out fronts and rears separately. Staggered suits road and stance builds. A square setup, the same size all round, suits serious track work because you can rotate tyres.

Tyres

The factory tyres carry BMW's star marking, which means they were co-developed and approved for the car. You don't have to keep the star when you replace them, but it explains why an OE tyre behaves slightly differently from the standard version. And don't stretch tyres. Pulling a narrow tyre over a wide rim throws away sidewall support, wet grip and the contact patch you paid for. If you want the look, get the offset right instead.

Lowering

Lowering is the fastest way to fix the slightly tall factory stance. Springs are simpler and cheaper, but they compress the factory damper's travel, so you reach the bump stops sooner and the ride gets crashier. Coilovers cost more, but they're valved to work at the lower height and keep more composure. We've compared the popular options in our G87 M2 suspension guide. Either way, expect arch liner rubbing once the car is lowered, and plan a clearance kit as part of the job.

Alignment and coding

A road alignment protects tyre life and stability. A track alignment trades some of that for turn-in and grip under load, and wears tyres faster on the road. Factory geometry is a compromise designed to suit every owner, so once you know how you use the car, a tailored alignment from a specialist will almost always suit it better. CS and CSL coding is one of the more interesting free upgrades: more focused factory maps for the steering, differential, traction control and gearbox, with no hardware at all.

Interior and tech

The interior is where restraint pays off most. Carbon Fibre accents work best when they echo what BMW already does, rather than covering every surface. Seats are the single biggest change to how the car feels driven hard. Carbon Fibre buckets, from Tillett or the factory, give far more support, save weight and fix you in a lower driving position. Sort the electronics properly, though. Removing the factory seats has airbag and occupancy sensing implications, and getting it wrong sets a warning light that needs a dealer and may disable a safety system you can't see. For tech, BMW's own coding and feature unlocks slot in cleanly. Aftermarket screens and head units are where the headaches start.

Installing it: DIY or professional?

Good work is only as good as the tools. Use a calibrated torque wrench, and keep impact guns for removal only. Wheel bolts go to 140 Nm in a star pattern, and you should re-check them after the first 50 miles on new wheels or spacers. Use quality trim tools, because most broken-clip jobs are really wrong-tool jobs, and keep penetrating oil, anti-seize and fresh fasteners to hand for exhaust and brake work. The most common install problems are broken clips, panel gaps from cheap parts or rushed fits, sensor faults after disturbing bumpers, and seized exhaust hardware. Dry-fit before you fix anything down.

One paint quirk worth knowing: even from the factory, the front bumper and bonnet can show a slight mismatch against the wings. It isn't necessarily a sign of past damage, but bear it in mind when buying or ordering a painted part.

Living with a modified M2

A modified M2 asks a bit more of you every day: the cold start that announces itself to the street, the drone on a long run, the care a deep splitter demands, and the attention a standout car attracts. None of it is a dealbreaker. All of it is worth knowing before you build.

Modifying also changes the maintenance schedule. Shorten oil intervals once the car is tuned or tracked, re-check wheel torque after fitting wheels or spacers, re-check alignment after the suspension settles, inspect exhaust clamps after winter, and refresh track fluid more often than the two-year road interval.

Reversibility is the theme. Tasteful, reversible, well-documented mods help resale: quality wheels, a good exhaust and professionally fitted aero. Deletes, aggressive tunes, cheap kits and drilled panels hurt it. Keep every original part, keep the receipts, and declare everything to your insurer.

The seven bad builds

None of these cars set out to be bad. They got there one impatient decision at a time.

• The over-spacered car. Big spacers to chase a flush look, without the offset or bolt length to back it up. Poked wheels, poor thread engagement, faster bearing wear and tramlining, and worse on xDrive. Fix the look with correct-offset wheels.
• The cheap Carbon Fibre car. Wet-lay parts bought on price, hazing and cracking within a year. Buy Pre-preg Carbon Fibre, or wait until you can.
• The too-low car. Slammed on springs past usable travel. It rides the bump stops, scrapes every entrance and handles worse than standard. Low is a look. Too low is a liability.
• The mismatched aero car. A splitter from one theme, a wing from another, a diffuser from a third. Pick one direction and finish it.
• The drone box. Cats and resonators gone for maximum volume, now exhausting on any motorway. Valve control exists for a reason.
• The stretched-tyre car. Narrow tyres on wide rims for a photo, throwing away grip and wet safety on a car with serious power.
• The big power, no cooling car. Stage 2 and beyond with no thought for cooling or fuelling. It heat-soaks and pulls timing after two hard laps.

Every bad build is a good car that someone built out of order, out of patience, or out of someone else's opinion.

Three example G87 M2 builds

Three reference builds, each coherent to a single intent. They're starting points, not shopping lists.

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The daily build shows that a valve controller makes an exhaust liveable, and that springs plus a good alignment get most people 90% of the stance they want. The street build accepts that the splitter changes daily driving and the cold starts are loud, on purpose. The track build puts cooling margin and consumables ahead of the next 30 hp. Build it to finish the session, then make it faster.

G87 M2 quick reference

The figures you'll end up photographing and keeping on your phone. Confirm any safety-critical value against your door placard and BMW's technical data before you rely on it, and always use a calibrated torque wrench.

Fix rubbing in this order: an arch liner clearance kit first, then liner trimming or a small arch roll if it still catches. Use the four reinforced sill jacking points with a rubber pad, never the floor pan, sump or subframe. Spacers need longer wheel bolts to keep proper thread engagement, at least the bolt's own diameter, and if you need big spacers it usually means you bought the wrong offset. Set tyre pressures from the door placard, and agree track pressures with whoever does your tyres for the compound you run.

The most common causes of a check engine light are downpipes, de-cats or high-flow cats without a supporting tune, OPF removal, and sensors disturbed during an install. Remember that a warning light also fails an MOT.

The AUTOID perspective

We run a G87 M2 ourselves. Our shop car is a manual LCI, and every principle in this guide comes from building cars like it, and from fixing the ones that were built the other way.

Build with intent. Decide what the car is for, then let that decision drive every choice. The best M2s aren't the ones with the most parts. They're the ones where every part agrees with the next. Buy once, buy right: quality parts, fitted properly, cost less over a build than the cheap version bought twice. That's true of Carbon Fibre, of wheels, of suspension, of all of it.

Respect what BMW got right. Sort out what they left on the table. In that order. Do that, and you'll end up with something rare: a modified car with nothing on it you wish you hadn't done.

Shop BMW G87 M2 parts or see the parts on our own G87 M2.

Specifications from BMW Group press materials and the BMW UK M2 page. UK prices correct at the time of writing. Tuning figures are typical estimates. Images: AUTOID.