01
Confidence Programme
Developed and inspected under a more disciplined quality direction, helping the buyer feel greater certainty in what they are ordering.
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.
ASM Specialist Live Now
Need Fitment or Product Guidance?
Speak directly with ASM Sports Tech for live WhatsApp assistance on fitment, lead time, compatibility, or build direction before ordering.
ASM SPORTS TECH
Confidence Is Built Into the Direction.
Premium ownership does not begin at delivery. It begins with material discipline, fitment philosophy, and the confidence that every component belongs to a more serious product standard.
Assurance Standard
Trust should feel designed into the product experience — not added later as reassurance.
Every ASM Sports Tech component is presented through a more resolved ownership philosophy: cleaner development direction, stronger fitment intent, and more premium support before and after purchase.
View Confidence Programme
02
OEM Precision Fitment
Engineered using 3D scanning and digital modelling to achieve cleaner fitment logic and stronger visual integration with the platform.
03
Performance Engineering
Lightweight composite construction, premium finish discipline, and stronger structural intent all contribute to a more resolved ownership outcome.
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.
ASM SPORTS TECH
Ownership Questions, Answered.
Clearer guidance before commitment. This section is designed to answer the final questions around fitment, installation, material direction, ordering, and support.
Compatibility is always based on the product title, listed fitment scope, and vehicle platform. If you are unsure before ordering, use the live WhatsApp support option and we can confirm the correct application before purchase.
Yes. Professional installation is strongly recommended, especially for carbon fibre aero parts, exhaust components, and platform-specific upgrades where alignment, finish protection, and correct hardware positioning matter.
Material specification depends on the product direction, but ASM Sports Tech focuses on stronger finish discipline, cleaner visual consistency, and more resolved platform-specific presentation across its premium programmes.
Lead time depends on whether the product is in stock, built to order, or part of a more exclusive production direction. The estimated timeline shown on the product page should be used as the main reference before checkout.
Yes. If you need help with fitment, visual direction, material choice, or build planning, use the WhatsApp consultation block on the page and we will guide you before you place the order.
Yes. Worldwide shipping is available across a wide range of ASM Sports Tech product lines. Shipping method and transit timing vary depending on product category, destination, and dispatch origin.
ASM SPORTS TECH
Authorised Dealer Access
For selected regions and projects, ASM Sports Tech can also be approached through an authorised partner network. This creates a more local route into the ownership experience while maintaining the same product direction.
Global Route
Prefer a more local path into the programme?
If you are ordering internationally, planning a wider build, or simply prefer a more regional point of contact, dealer access can provide a cleaner route into the ASM Sports Tech product direction.
01
Regional Access
Selected customers may prefer a more local path into the product programme through an authorised ASM partner.
02
Project-Based Ordering
Wider builds and multi-part upgrade directions can often benefit from a more coordinated route before final order placement.
03
Direct or Dealer Route
Whether you proceed directly with ASM Sports Tech or through an authorised partner, the objective remains the same: a more resolved ownership experience.
ASM SPORTS TECH
Complete Your Build
Continue the programme with matching components selected to complement the visual direction, fitment logic, and overall presence of the build.
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
