Untd. Performance 4.5″ Catless Downpipe BMW M240 M340i M440i 540i/740i – xDrive – F3X

Unlock the true performance potential of your BMW M240i, M340i, M440i, or 540i/740i xDrive with the Untd. Performance 4.5″ Catless Downpipe. Designed for the B58 3.0L I6 turbo engine, this high-flow catless downpipe removes restrictive factory catalytic converters to improve exhaust flow, reduce backpressure, and enhance turbo efficiency. The result? Increased horsepower, quicker turbo spool, improved throttle response, and a more aggressive exhaust sound, making it the perfect performance upgrade for your F3X BMW.

Key Features:

4.5″ Catless Design
The Untd. Performance Catless Downpipe eliminates the restrictive factory catalytic converters, allowing your B58 engine to breathe freely. The large 4.5″ diameter pipe ensures maximum exhaust flow, reducing backpressure and turbo lag. This results in more immediate power delivery and better overall engine performance, whether you’re on the street or pushing your BMW to its limits on the track.

Aggressive Exhaust Sound
With the factory catalytic converters removed, your BMW’s exhaust note is transformed. Expect a much deeper, louder, and more aggressive tone, especially under acceleration. Turbo spool sounds become more pronounced, and you’ll hear thrilling pops and crackles during deceleration—making your BMW’s presence known on every drive.

Precision Engineered for Performance
Crafted from high-quality 304 stainless steel, this downpipe is built to withstand high temperatures and demanding driving conditions. TIG-welded for durability and CNC-machined flanges for a perfect fit, the Untd. Performance Catless Downpipe ensures long-term reliability and leak-free performance, even under extreme conditions.

Enhanced Turbo Response
By reducing backpressure and improving exhaust flow, this downpipe allows your turbocharger to spool faster and more efficiently. The result is quicker throttle response, less lag, and an overall improvement in engine performance across the rev range. Whether you’re at low RPMs or pushing your car to the limit, expect better throttle response and increased power.

Bolt-On Installation
This downpipe is designed for a seamless, bolt-on installation. It directly replaces the stock downpipe with no cutting or welding required, making the installation process straightforward and hassle-free. With precise fitment and no additional modifications needed, you can focus on enjoying the enhanced performance.

Compatibility:

• BMW M240i – B58 3.0L I6 Turbo (F22, F23)

• BMW M340i – B58 3.0L I6 Turbo (F30, F31, F34)

• BMW M440i – B58 3.0L I6 Turbo (F32, F33, F36)

• BMW 540i – B58 3.0L I6 Turbo (G30, G31)

• BMW 740i – B58 3.0L I6 Turbo (G11, G12)

• BMW xDrive Models – B58 3.0L I6 Turbo (All F3X Variants)

The Untd. Performance 4.5″ Catless Downpipe is the ultimate performance upgrade for your BMW M240i, M340i, M440i, or 540i/740i xDrive. With its larger diameter, high-flow design, and catless configuration, it unlocks improved turbo performance, more horsepower, and an aggressive exhaust note that truly enhances your driving experience.

Note: This downpipe is designed for off-road and motorsport use only. It is not emissions-compliant in all regions. Please verify local regulations before installation.