Akrapovič

Akrapovič exhausts for BMW M and Porsche, supplied in the UK

AUTOID is a UK supplier of the full Akrapovič exhaust range for BMW M Performance and Porsche road cars. Every system listed here is hand-built in Slovenia from race-grade titanium and pre-preg carbon fibre, engineered to OEM fitment standards, and shipped with the manufacturer's two-year warranty. With 130+ active part numbers across the M and 911/718/Cayenne/Panamera lineups, this collection is built specifically for car enthusiasts — not motorcycle riders looking for Slovenian exhausts in the UK.

Why Akrapovič

Akrapovič has been the OEM-spec exhaust partner for BMW M Performance, Porsche, Mercedes-AMG and Aston Martin Q since the early 2000s, and is the homologated supplier to multiple Formula 1, World Superbike and MotoGP programmes. The reason every M Performance and 911 GT3 owner ends up looking at an Akrapovič exhaust is the same reason the factories use them: a measurable weight reduction (typically 5–8 kg less than the OE titanium system on M cars, 10 kg+ on 911 GT3), a hand-rolled titanium tone that's both road-legal and unmistakable, and finishes — high-gloss carbon, matte carbon, brushed titanium — that match the OEM aesthetic without looking aftermarket.

Akrapovič

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Frequently asked questions
Is Akrapovič road legal in the UK?

Yes. The Slip-On Line and Evolution Line systems we stock are ECE Type Approved under regulation R59 and are road-legal in the UK with the supplied dB killers fitted. They will pass an MOT noise test on standard OBD parameters and do not trigger fault codes or engine warning lights when paired with the Akrapovič valve controller. The Slip-On Race Line and Evolution Race systems are decatted track-only products and will not pass an MOT in road-legal trim — these are clearly marked as Race Line on the product page and we flag any Race Line order at checkout. If you're unsure which version of an Akrapovič exhaust system you're looking at, the part number prefix is the giveaway: S-PO/TI denotes a road-homologated titanium system, S-PO/T (without the "I") denotes a Race Line.
Does an Akrapovič exhaust void my BMW or Porsche warranty?

No, not in the way most people fear. Under UK consumer law, the manufacturer cannot void your entire warranty simply because you've fitted an aftermarket exhaust — they can only refuse a warranty claim where the modified part is the proven cause of the failure. Akrapovič systems are designed to bolt onto OE mounts without permanent modification to the chassis, and BMW M Performance and Porsche themselves have used Akrapovič as their factory exhaust partner since the early 2000s, so the dealer networks treat them as a known quantity. The OE exhaust itself is generally considered a serviceable component rather than a warrantied one. Akrapovič's own two-year manufacturer warranty covers the new system from date of supply and is honoured directly through AutoID — you don't need to ship anything back to Slovenia.
What's the difference between Slip-On Line and Evolution Line?

The Slip-On Line replaces only the rear muffler section of your exhaust; the Evolution Line replaces the full system from the catalytic converters back, including the link pipes and rear muffler. Practically, that means the Slip-On is a 1–2 hour bolt-on with no remap required, saves around 4–7 kg over the OEM titanium system, adds 3–5 dB of tone, and costs roughly £3,500–£6,500 depending on chassis. The Evolution Line is a 3–5 hour install, saves 8–12 kg, adds 5–8 dB, unlocks 5–15 bhp on turbocharged applications (more with a stage 1 map), and costs roughly £6,500–£9,500. If you only ever plan to do an exhaust, go Slip-On. If this is the first step in a wider build that will eventually include link pipes, headers and a tune, start with Evolution and skip the upgrade tax later.
Does an Akrapovič exhaust actually add power?

Yes, but the gains depend heavily on your chassis. On naturally aspirated cars like the 911 GT3 or M3 E92, a full Evolution Line plus Evolution Headers will typically free 8–15 bhp by lowering back-pressure and improving exhaust scavenging. On turbocharged cars like the G80 M3, G82 M4, F90 M5, 911 Turbo and Cayenne Turbo, the immediate gain from a Slip-On Line is modest (3–5 bhp), but the lighter, lower-restriction full Evolution system unlocks meaningful headroom when paired with a stage 1 ECU map — typically 25–40 bhp gain across the package versus stock. The other, less-quoted benefit is weight: an Akrapovič titanium system saves 8–12 kg from the rear of the car, which is felt in steering response far more than the dyno graph shows.
How loud is an Akrapovič exhaust, and what does the dB killer do?

Akrapovič road-legal systems add roughly 3–5 dB to your stock exhaust note for the Slip-On Line and 5–8 dB for the Evolution Line, measured under WOT at the tailpipe — comfortably within UK MOT noise limits and ECE-R59 homologation. The dB killer is a removable acoustic insert that sits inside the rear muffler; with it fitted, the system runs in homologated, road-legal mode. With it removed (a 5-minute job, no tools required on most chassis), the system runs in its louder, fully track-spec voice — typically another 4–6 dB on top, plus a noticeably more aggressive overrun and crackle. If your car has the Akrapovič valve controller fitted, you also get full electronic control of the OE exhaust valves from a phone app, so you can run quiet on a 6am start and full song on a B-road without touching the dB killer at all.

Akrapovič exhausts for BMW M and Porsche, supplied in the UK

AUTOID is a UK supplier of the full Akrapovič exhaust range for BMW M Performance and Porsche road cars. Every system listed here is hand-built in Slovenia from race-grade titanium and pre-preg carbon fibre, engineered to OEM fitment standards, and shipped with the manufacturer's two-year warranty. With 130+ active part numbers across the M and 911/718/Cayenne/Panamera lineups, this collection is built specifically for car enthusiasts — not motorcycle riders looking for Slovenian exhausts in the UK.

Why Akrapovič

Akrapovič has been the OEM-spec exhaust partner for BMW M Performance, Porsche, Mercedes-AMG and Aston Martin Q since the early 2000s, and is the homologated supplier to multiple Formula 1, World Superbike and MotoGP programmes. The reason every M Performance and 911 GT3 owner ends up looking at an Akrapovič exhaust is the same reason the factories use them: a measurable weight reduction (typically 5–8 kg less than the OE titanium system on M cars, 10 kg+ on 911 GT3), a hand-rolled titanium tone that's both road-legal and unmistakable, and finishes — high-gloss carbon, matte carbon, brushed titanium — that match the OEM aesthetic without looking aftermarket.

The Akrapovič system range, explained

Slip-On Line — replaces the rear muffler section only. The simplest install, no engine remap required, MOT-compatible on most chassis. Weight saving 4–7 kg, modest power gain (typically 2–5 bhp on M cars), and a 3–5 dB increase under load. Pricing typically £3,500–£6,500 depending on chassis.

Evolution Line — replaces the full system from the catalytic converter back, including link pipes and rear muffler. Larger weight saving (8–12 kg), measurable power gain (5–15 bhp on turbocharged M and Porsche applications), and a deeper, more aggressive tone. Best paired with a stage 1 ECU map. £6,500–£9,500.

Slip-On Race Line — track-focused, decatted rear section. Significant weight reduction, lower back pressure, considerably louder. Road use depends on local noise regulations; intended primarily for closed-circuit use. £3,500–£5,500.

Evolution Header Set — replaces the OEM exhaust manifolds with Akrapovič's own equal-length titanium headers. Available with or without high-flow sport catalysts. Typically the final stage of an Akrapovič build for serious power gains on naturally aspirated chassis (911 GT3, GT4 RS).

Link Pipes — connecting pipework between the headers/cats and the rear section, available with or without 200-cell sport cats. Required when stepping from a Slip-On to a full Evolution system. £1,800–£5,000.

Sound Kits and Valve Controllers — Akrapovič's own electronic actuator kit that gives you manual control of the OE exhaust valves from your phone. Adds the variable-volume behaviour to chassis that didn't come with it from factory, or unlocks full-open mode on chassis that ship valve-shut on cold starts. £400–£1,300.

Carbon Fibre Rear Diffusers and Exhaust Tips — pre-preg carbon aero pieces engineered to match the Akrapovič tailpipe geometry exactly. High-gloss or matte finish. Sold individually or as part of a system package.

BMW M cars we cover

Akrapovič systems and components are in stock or available to order for the G87 M2, G80 M3, G82 M4 (including G81/G83 Touring and Convertible), F80 M3, F82/F83 M4, F87 M2 and M2 Competition/CS, E92/E93 M3, F90 M5, G90/G99 M5, F10 M5, F12/F13 M6, F91/F92/F93 M8 and Competition, and the G09 XM.

Porsche models we cover

Akrapovič stock covers the 911 GT3, GT3 Touring and GT3 RS across 991.1, 991.2 and 992.1, the 911 Turbo and Turbo S on 991.1, 991.2 and 992.1, 911 Carrera, S and GTS on 991.1, 991.2 and 992.1, the 718 Cayman GT4, GT4 RS, Spyder and Spyder RS, 718 Cayman GTS 4.0 and Boxster GTS 4.0, the Cayenne 536.1, 536.2 and 958 across petrol and E-Hybrid variants, Macan 95B, and the Panamera 971 in all drivetrain configurations.

UK road-legal status, MOT and warranty

The Slip-On Line and Evolution Line systems sold here carry ECE Type Approval and are road-legal in the UK with the supplied dB killers fitted. They will pass an MOT noise test on stock OBD parameters and do not trigger fault codes when paired with the Akrapovič valve controller. Slip-On Race Line systems are decatted and intended for track use; they will not pass an MOT in road-legal trim and we'll flag this explicitly at checkout for any Race Line order. Akrapovič systems are designed to be installed and removed without permanent modification to the chassis or the OEM exhaust mounts, which means they do not affect the underlying manufacturer warranty on the engine or drivetrain — only the OE exhaust itself, which the BMW M and Porsche dealer networks generally treat as a serviceable consumable. Akrapovič's own two-year manufacturer warranty covers the system from date of supply and is honoured directly through AUTOID in the UK.

Delivery, fitment and support

Akrapovič manufactures most systems to order, so typical lead times from order to delivery are 4–8 weeks depending on chassis and finish. We hold stock of the highest-demand BMW M and 911 GT3 lines where lead times can compress to 7–14 days. Pricing shown is the UK retail price in GBP, inclusive of VAT, with free UK mainland delivery on all systems. We work with a network of M and Porsche specialists for fitment if you don't have a preferred installer — get in touch with the chassis code, system part number and your postcode and we'll route you to the nearest option.