Performance M
Garage Whifbitz 3" (76mm) Decat/De-Cat Downpipes for BMW M3, M4 & M2 Competition S55 (F80/F82/F83/F87) – Catless Turbo Downpipes/Test Pipes, 304 Stainless, Stage 2/Track, 2014-2021
Garage Whifbitz 3" (76mm) Decat/De-Cat Downpipes for BMW M3, M4 & M2 Competition S55 (F80/F82/F83/F87) – Catless Turbo Downpipes/Test Pipes, 304 Stainless, Stage 2/Track, 2014-2021
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Performance de-cat pipes for BMW S55 (M3, M4, M2 Competition)
Unlock serious exhaust flow and a harder, more aggressive soundtrack with these 76 mm de-cat turbo pipes from Garage Whifbitz, engineered specifically for the BMW S55-powered M3, M4 and M2 Competition. Built from premium 304 stainless steel and featuring a flexi section for durability and longevity, this upgrade replaces the restrictive factory catalytic converters to let your twin-turbo straight-six breathe and spool more freely.
Why choose these 3 inch de-cat downpipes
- High-grade 304 stainless construction for strength and corrosion resistance
- Integrated flex section helps reduce stress and vibration for long-term reliability
- Large 76 mm tubing for significantly increased gas flow and reduced back pressure
- Transforms sound with a sharper, sportier tone under load
- Ideal foundation for Stage 2 style tuning packages on the S55 platform
Engineered for the S55 platform
Tailored for the BMW M3, M4 and M2 Competition with the S55 engine, these race downpipes are a popular upgrade for enthusiasts seeking more response, stronger mid-range punch and a more engaging exhaust note. They’re a go-to choice for track-day setups and performance builds looking to maximise turbo efficiency.
What you can expect
- Faster turbo spool and improved throttle response
- Freer-flowing exhaust path versus the OEM catalyst assemblies
- Crisper, more pronounced turbo and exhaust character
Fitting and support
Want it installed properly the first time? Book professional fitting with MJ Modifications in Warwickshire. Our team has fitted these on customer cars and our own builds with excellent results and feedback on fitment, sound and performance. Email info@mjmodifications.co.uk for a tailored installation quote or to discuss supporting mods and software.
Important notes
- For off-road/track use where legal; removal of catalytic converters is not road legal in many regions
- May trigger an emissions-related warning light without appropriate software
Upgrade your S55 exhaust system with confidence. These Garage Whifbitz 3 inch de-cat downpipes deliver the flow, sound and quality enthusiasts demand, backed by happy MJ Modifications customers across the UK. Add to basket or get in touch to arrange expert installation.
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