BMW B48 Catless Performance Downpipe – 220i 330i 420i 430i X1 X2 Z4
Unlock improved exhaust flow, quicker turbo response and a more aggressive exhaust tone with this high-flow performance downpipe for select BMW models equipped with the turbocharged B48 2.0L engine. Constructed from durable stainless steel with smooth mandrel-bent piping, this downpipe replaces the restrictive factory catalytic-converter section. The integrated flex joint allows controlled exhaust movement, helping reduce unnecessary stress on the turbocharger and exhaust system. Features: High-flow catless performance design Stainless-steel construction Smooth mandrel-bent piping TIG-welded connections Reinforced stainless-steel flex section CNC-machined mounting flanges Factory-style mounting bracket Dual oxygen-sensor provisions Reduces exhaust restriction and backpressure Supports quicker turbo spool and improved throttle response Produces a louder, more aggressive exhaust tone Compatible with factory and aftermarket exhaust systems Designed for select B48-powered models: BMW 220i BMW 330i BMW 420i BMW 430i BMW X1 25i BMW X2 20i and 30i BMW Z4 20i and 30i Important Fitment Information: BMW used multiple downpipe configurations across B48-powered vehicles and markets. Compatibility must be confirmed by comparing the turbo flange, exhaust connection, oxygen-sensor locations and overall shape with the original downpipe before ordering. Not compatible with B46-equipped vehicles unless otherwise confirmed. Please Note: This competition downpipe does not contain a catalytic converter. Installation may trigger a check-engine light and normally requires performance tuning. Professional installation is strongly recommended. For closed-course competition and off-road use only. Not legal for use on pollution-controlled public-road vehicles and not for sale or use in California. The purchaser is responsible for complying with all applicable emissions laws.