Unlock maximum exhaust flow and turbo efficiency with this 5-inch catless downpipe designed specifically for 2024+ BMW G20/G22 M340i and M440i equipped with the Gen 3 B58 BMW engine. Built for high-performance applications, this downpipe dramatically reduces backpressure compared to the restrictive factory catalytic converter, allowing the turbo to spool faster and deliver stronger, more consistent power.

Constructed from high-quality stainless steel, the downpipe features smooth mandrel bends, precision TIG welds, and a durable flex section to accommodate engine movement while maintaining a proper seal. The oversized 5.0″ diameter maximizes exhaust flow, making it ideal for tuned vehicles and higher boost setups.

This is a direct bolt-on replacement that retains factory mounting points and sensor locations for straightforward installation. Designed for off-road or track use, this catless downpipe will produce a more aggressive exhaust note and typically requires ECU tuning to prevent a check engine light.

Perfect for enthusiasts looking to push their Gen 3 B58 platform to the next level with improved power, sound, and throttle response.

Features:

• Fits 2024+ BMW G20/G22 M340i & M440i (Gen 3 B58)
• 5.0″ high-flow catless design for maximum performance
• Improves turbo response, horsepower, and torque
• Precision TIG-welded stainless-steel construction
• Integrated flex section for durability and fitment
• Direct bolt-on installation
• Designed for off-road / motorsport use only

 

Applications:

BMW M340i/ix B58 motor, G20/G22 2025+
BMW M440i/ix B58 motor, G20/G22 2025+

This product is sold for off road use only. It is not legal for use on public highways. This product is not for sale or use in California. It is available to our international customers for use within legal limits in their domicile.
These parts are intended for off road or track use only!