BMW M3 F80 & M4 F82 / F83 S55 3.5" High-Flow Catless Downpipes
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Maximize Exhaust Flow and S55 Turbo Performance with 3.5" High-Flow Catless Downpipes
Designed for the BMW M3 F80 and BMW M4 F82/F83 with the S55 3.0L twin-turbo engine, these 3.5-inch high-flow catless downpipes replace the restrictive factory catalytic sections to significantly improve exhaust flow and reduce backpressure.
Manufactured from high-quality 304 stainless steel, the enlarged dual 3.5-inch free-flow design allows exhaust gases to exit the turbochargers more efficiently, helping support sharper turbo response and tuned performance while producing a louder, deeper and more aggressive S55 exhaust note. Vehicle-specific construction allows integration with the factory turbochargers and compatible OEM or aftermarket exhaust systems.
Compatible ECU software may be required to prevent warning lights and achieve the intended performance results. Professional installation is recommended.
Key Features:
- High-quality 304 stainless steel construction
- Dual 3.5-inch high-flow design
- Catless free-flow construction
- Designed for BMW S55 3.0L twin-turbo engines
- Removes restrictive factory catalytic converters
- Improves exhaust flow
- Reduces exhaust backpressure
- Supports sharper turbo response
- Louder and more aggressive exhaust note
- Compatible with OEM and upgraded exhaust systems
- Designed to support performance tuning
- Professional installation recommended
Package Includes:
- 1 × Pair of 3.5" High-Flow Catless Downpipes
Important Information:
Compatible ECU software may be required after installation to prevent warning lights and achieve the intended performance results. Catless downpipes are intended for off-road or motorsport use where permitted and may not comply with local emissions, inspection or public-road regulations.