S55 3" Catless Downpipes – Fits BMW M3 F80, M4 F82/F83, M2 Competition F87 (2015–2021)

Unleash the full potential of your S55-powered BMW with these 3" Race Downpipes. Designed to replace the restrictive factory catalytic converters, they deliver:

• Faster turbo spool and sharper throttle response

• Aggressive exhaust tone that brings out the raw character of the S55

• Proven dyno gains – up to +25hp and +30lb-ft of torque with proper tuning

• Optimized exhaust flow to support high-boost and big-power builds

Constructed from 304-grade stainless steel, these downpipes feature a seamless cast v-band transition and maintain a full 3" diameter close to the turbo outlet for maximum flow. Each unit is hand TIG-welded and finished with CNC-machined flanges, ensuring strength, precision, and long-term durability.

Installation is straightforward with Grade 12 hardware included, and they fit both RHD and LHD vehicles with no modifications required.

Why Choose These Downpipes?

• Best sound upgrade – unleash the S55 with a deeper, more aggressive tone

• Performance proven – supports big gains with tuning

• Durable design – stainless steel, TIG-welded, corrosion resistant

• Optimized flow – cast v-band transition for smooth exhaust velocity

• Direct fitment – installs with factory mounting points, no cutting/welding

Technical Specs

• Material: 304-grade stainless steel

• Diameter: Full 3" mandrel-bent tubing

• Transition: Seamless cast v-band to pipe

• Flanges: CNC-machined for precise fit

• Welding: Hand TIG-welded for strength and consistency

• Performance: +25hp / +30lb-ft torque with tuning

• Hardware: Includes Grade 12 bolts

• Fitment: OEM and aftermarket exhausts

• Configuration: Race setup (catalytic converters removed)

Vehicle Fitment

BMW M3 (F80)

• 2015–2020 (S55, including Competition models)

BMW M4 (F82 / F83)

• 2015–2020 (S55, including Competition models)

BMW M2 Competition (F87)

• 2018–2021 (S55 engine)

Important Note

These race downpipes are intended for off-road and track use only. They are not legal for use on public roads and may not comply with emissions regulations. Please check local laws before installation.