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.