FabSpeed BMW M235i (F22) Cat Bypass Downpipe



HJS German imported catalytic converters are made from some of the highest grade materials you can find in a catalytic converter. This yields high performance gains and longevity so it wont deteriorate over time like lower grade catalytic converters. These catalytic converters flow up to 93-95% of a straight pipe in most applications. The benefit is that you get the "straight pipe sound" while still being able to provide enough emissions scrubbing to prevent a check engine light.    

The ultimate catless downpipe offering maximum power and sound; adds 24 whp and 43 ft/lbs of torque at 3000 RPM; not recommended for street use                          


  • Fits all BMW F22 M235i vehicles

  • Replaces the two restrictive factory catalytic converters with a free-flowing straight pipe section for maximum exhaust flow

  • Direct bolt-on replacement; no cutting or welding required

  • Recommended for track and off-road use only (NOTE: It the purchaser's responsibility to verify legality and compliance in their region.)

  • Adds 24 whp and 43 ft/lbs of torque at 3000 RPM


  • Peak Power

    • Stock= 309 whp / 328 ft/lbs

    • Exhaust = 322 whp / 357 ft/lbs

  • Maximum Gains

    • 3000 RPM = +24whp / +43ft/lbs

    • 4500 RPM = +23whp / +27ft/lbs 


DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only. This product is or contains a Racing Cat Bypass Pipe, which will give you check engine lights on OBD2 cars. We suggest pairing this product with racing software to prevent fault codes and check engine lights. Racing Cat Bypass Pipes are solely intended for track and race cars as they are NOT California Air Resources Board Certified and not EPA certified. You are hereby informed and warned to check your local, state, and federals laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.