ARM Motorsports 6" B58 Catted Downpipe BMW 240i 340i 440i 540i 640i 740i F30 F22

Free Shipping HIGHLIGHTS • 6" 200 Cell High-Flow Catalyst• Improved Exhaust Sound• Faster Turbo Spool • Stage 2+ Tune Compatibility    PROFILE The ARM 6" B58 Catted Downpipe is perfect if you're looking for all of the performance of a Catless B58 Downpipe without the odor associated with increased emissions. Our B58 Catted Downpipe design incorporates a 6" high-flow 200 cell ceramic catalytic converter, making it a standout choice for those seeking power without while reducing emissions. The increased volume and improved turbo spool that from the catless variations are still present in our 6" B58 Catted Downpipe.The ARM 6" Catted B58 Downpipe replaces the restrictive factory downpipe with a 200 cell catalyst with a 6" diameter that significantly improves exhaust flow. This upgrade unlocks additional power and torque while reducing emissions compared to a full catless B58 downpipe, allowing you to safely run Stage 2+ tunes and enjoy a more vibrant sound from your B58-powered