$330.00
Elevate the performance of your BMW M240i, M340i, M440i, or X5 40i xDrive with the Untd. Performance 4.5″ Catless Downpipe. Designed for the powerful B58 3.0L I6 turbo engine, this high-flow catless downpipe replaces the restrictive factory catalytic converters, significantly improving exhaust flow and turbocharger efficiency. The result is a marked increase in horsepower, faster turbo spool, enhanced throttle response, and a deeper, more aggressive exhaust note, making it the perfect upgrade for your BMW.
Available on backorder
Elevate the performance of your BMW M240i, M340i, M440i, or X5 40i xDrive with the Untd. Performance 4.5″ Catless Downpipe. Designed for the powerful B58 3.0L I6 turbo engine, this high-flow catless downpipe replaces the restrictive factory catalytic converters, significantly improving exhaust flow and turbocharger efficiency. The result is a marked increase in horsepower, faster turbo spool, enhanced throttle response, and a deeper, more aggressive exhaust note, making it the perfect upgrade for your BMW.
4.5″ Catless Design
The Untd. Performance Catless Downpipe features a large 4.5″ diameter, which eliminates the restrictive factory catalytic converters, allowing for unrestricted exhaust flow. This catless design reduces backpressure, which leads to faster turbo spool, improved throttle response, and a noticeable boost in horsepower across the RPM range. Whether you’re carving up winding roads or hitting the track, this downpipe optimizes performance at every level.
Aggressive Exhaust Sound
By removing the factory catalytic converters, the exhaust note of your BMW becomes more pronounced. You’ll experience a louder, deeper sound with sharper turbo spool, plus pops and crackles during deceleration. The more aggressive exhaust tone enhances the driving experience, giving your BMW an unmistakable motorsport-inspired soundtrack.
Durable, High-Quality Construction
Constructed from premium 304 stainless steel, this downpipe is designed to handle the intense temperatures and pressures produced by your turbocharged engine. TIG-welded for maximum strength and CNC-machined flanges ensure a precise fit and a leak-free, long-lasting performance. Built to withstand even the most demanding conditions, this downpipe is engineered for ultimate durability.
Enhanced Turbo Response and Performance
The catless design significantly reduces exhaust backpressure, allowing the turbocharger to spool faster and more efficiently. This leads to better throttle response, reduced turbo lag, and an overall increase in engine performance. From daily driving to spirited weekend drives, the Untd. Performance Catless Downpipe delivers smoother power delivery and enhanced performance.
Bolt-On Installation
Designed for an easy, bolt-on installation, the Untd. Performance 4.5″ Catless Downpipe directly replaces the factory downpipe without the need for cutting or welding. The perfect fitment ensures a hassle-free upgrade, so you can enjoy the added performance benefits without extensive modifications.
BMW M240i – B58 3.0L I6 Turbo (F22, F23)
BMW M340i – B58 3.0L I6 Turbo (G20, G21, G22)
BMW M440i – B58 3.0L I6 Turbo (G22, G23, G26)
BMW X5 40i xDrive – B58 3.0L I6 Turbo (G05)
The Untd. Performance 4.5″ Catless Downpipe is the perfect performance upgrade for any BMW M240i, M340i, M440i, or X5 40i xDrive. Its larger diameter, catless design, and high-flow capabilities unlock significant power gains, improved turbo spool, and a more aggressive exhaust sound that takes your driving experience to the next level.
Note: This downpipe is intended for off-road and motorsport use only. It is not emissions-compliant in all areas. Please verify local emissions laws and regulations before installation.
