BMW 435I N55 DOWNPIPE SPORT CATS / DE-CAT ASM PERFORMANCE
The ASM Performance exhaust sections for the N55 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.
Constructed from high-grade stainless steel and wrapped in thermal protection, this downpipe ensures long-term durability under extreme heat. Whether you’re building a street car or prepping for the track, it’s the ultimate bolt-on exhaust mod for more power and sound.
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:
- 1 Series (F20) M135i, M135i XDrive 235 kW + 240 kW N55 engine, built from 07/2013
- 1 Series (F21) M135i, M135i XDrive, 235 kW N55 engine, built from 07/2013
- 2 Series (F22) M235i, Coupe, 240 kW N55 engine, built from 07/2013
- 2 Series (F23) M235i, Cabriolet, 240 kW N55 engine, built from 07/2013
- 2 Series (F87) M2, 272 kW N55 engine, built from 07/2013
- 3 Series (F30) 335i, 335iX, Sedan, 225 kW + 240 kW + 250 kW N55 engine, built from 07/2013
- 3 Series (F31) 335i, 335iX Touring, 225 kW + 240 kW + 250 kW N55 engine, built from 07/2013
- 3 Series GT (F34) 335i, 335iX, Gran Turismo, 225 kW + 240 kW + 250 kW N55 engine, built from 07/2013
- 4 Series (F32) 435i, 435iX Coupe, 225 kW + 250 kW N55 engine, built from 07/2013
- 4 Series (F33) 435i, 435iX, Cabriolet, 225 kW + 250 kW N55 engine, built from 07/2013
- 4 Series (F36) 435i, 435iX Gran Coupe, 225 kW + 250 kW N55 engine, built from 07/2013
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.
