Precision Fitment
Each part is 3D-scanned against the platform and digitally modelled before tooling — so fitment is engineered, not approximated.
BMW M2 G87 Front Downpipes – Sports Cat / Decat Version for S58 Engines
Price range: £1,098.86 through £1,654.22
The ASM PERFORMANCE exhaust sections for the S58 engines are meticulously engineered to improve your vehicle sound and performance.
Specialist online — replies in minutes
Speak to ASM before you order
Straight answers on fitment, lead time and build direction — direct from the team that engineers it.
Open WhatsApp LineDoubt removed
before commitment
Every component leaves on one standard: measured fitment, disciplined materials, and a specialist on the line before and after you order. The proof sits below — not the promise.
Composite Construction
Pre-preg carbon and lightweight composite, finished to a consistent standard and built for structural intent — not cosmetic weight.
Support, Both Sides of the Sale
A specialist answers fitment, lead time and compatibility before you order — and stays reachable after it ships.
BMW M2 G87 S58 DOWNPIPE SPORT CATS / DE-CAT ASM PERFORMANCE
The ASM PERFORMANCE exhaust sections for the S58 engines are meticulously engineered to improve your vehicle sound, delivering the ultimate driving experience.
Our downpipes come equipped with a heat shield to contain heat and unleash the full power of your car during high-speed accelerations.
Our sports exhaust selection is fully backed with a lifetime warranty, ensuring quality assurance.
Features & Details
- Substantial power increase
- Specially designed smooth transition for optimized flow
- Improved spool up speed and throttle response
- Extended turbo lifespan
- Lowering under hood temperature
- Enhanced performance sound
- 100% Easy and secure bolt-on installation
- Fully tig welded and back purged crafting
- Top-tier 304L stainless steel with a 2.00mm thick wall
- Compliant with both LHD and RHD vehicles
- Backed by a lifetime warranty
These will fit the following models:
- BMW M Series G80 M3 S58 (2021+)
- BMW M Series G80 M3 Competition S58 (2021+)
- BMW M Series G80 M3 Competition xDrive S58 (2021+)
- BMW M Series G81 M3 Competition xDrive Touring S58 (2021+)
- BMW M Series G82 M4 S58 (2021+)
- BMW M Series G82 M4 Competition S58 (2021+)
- BMW M Series G82 M4 Competition xDrive S58 (2021+)
- BMW M Series G83 M4 Competition Convertible S58 (2021+)
- BMW M Series G83 M4 Competition xDrive Convertible S58 (2021+)
- BMW M Series G87 M2 (2023+)
What is the difference between a sport cat and a decat?
Sport Cat Downpipes
Catalytic Converter Included: Sport cat downpipes include a high-flow catalytic converter. This helps reduce exhaust emissions while still allowing for increased flow compared to standard catalytic converters.
Emissions Compliance: They are designed to be street-legal in many areas, as they still filter harmful emission, though regulations can vary by region.
Performance: Sport cat downpipes strike a balance between performance and emissions compliance. They offer a noticeable increase in horsepower and torque compared to stock downpipes, but might not be as free-flowing as decat downpipes.
Sound: The sport cat downpipes provide a moderate increase in exhaust sound over the stock system.
Decat Downpipes
No Catalytic Converter: Decat downpipes eliminate the catalytic converter entirely, resulting in zero filtration of exhaust gases.
Higher Performance: They allow for maximum exhaust flow, which can result in significant performance gains, particularly for turbocharged engines.
Emissions Non-Compliance: Decat downpipes are typically illegally for street use in most regions due to their complete lack of emissions control. They are generally indented for track use or off-road racing.
Emissions Non-Compliance: They produce a louder and more aggressive exhaust note.
The de-cat exhaust version is available for motorsport and off-road use exclusively worldwide.
The questions
worth asking first
Fitment, installation, materials, lead time and support — the answers that settle the last doubts before you order. Anything not covered, the specialist line is one tap away.
Fitment is defined by the product title, the listed application scope and your platform. If you're unsure, open the WhatsApp line and a specialist will confirm the correct application before you order.
Yes — particularly for carbon aero, exhaust components and platform-specific upgrades, where alignment, finish protection and correct hardware positioning matter to the result.
It depends on the part, but the standard is consistent: disciplined finish, clean visual consistency and resolved platform-specific presentation. Pre-preg carbon and lightweight composite where the application calls for it.
It depends on whether the part is in stock or built to order. The estimated timeline on the product page is the reference to use before checkout — and the specialist line can confirm it for your exact spec.
Yes. For fitment, visual direction, material choice or build planning, use the WhatsApp block on this page and a specialist will guide you before you place the order.
Yes — worldwide shipping is available across most ASM Sports Tech lines. Method and transit time vary by product category, destination and dispatch origin.
Two ways
to order
Order directly with ASM Sports Tech, or through an authorised partner in your region. Same components, same standard — whichever route fits the build.
Regional Access
Prefer a local point of contact? An authorised ASM partner in your region can handle the order end to end.
Project-Based Ordering
Multi-part builds and full upgrade directions are best coordinated as one order — we'll plan it with you before placement.
Direct or Dealer
Order direct from ASM or through a partner — the parts, the fitment standard and the support are identical either way.
// ASM Sports Tech — The Programme
Complete the build
Matching components for the same platform — selected to fit alongside what you're ordering and finish the build as one resolved direction.
BMW M4 G82 / G83 Carbon Fibre Replacement Mirrors
Price range: £480.00 through £580.00
View Product
This product has multiple variants. The options may be chosen on the product page
