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and stronger mid- to high-RPM performance
Improved Exhaust Flow Eliminates restrictive OEM secondary cats and resonators to boost performance
Kies Motorsports conversion kits are always comprehensive and fit snug like a glove
Legal only for racing vehicles which may never be used upon a highway
MAD BMW F & G Chassis B46 Downpipe 220 230 320 330 420 430 730 Catted F22 BUMPER and stronger mid- to high-RPMUpgrade from the stock B46 downpipe to the MAD B46 catted downpipe for maximum airflow, power, and sound. The MAD BMW B46 catted downpipe is the perfect upgrade for getting more performance and a cleaner exhaust tone while keeping your setup street friendly. The built in high flow catalytic converter reduces restriction compared to the factory cat, allowing your turbo to spool quicker and push more power. At the same time, it helps maintain
