Experience pure, unrestricted performance with the CRT Performance Catless Downpipe, engineered specifically for BMW F-Series models equipped with the B58 engine – including M140i, M240i, 340i, 440i, and 540i. By removing the restrictive factory catalytic converter, this downpipe drastically reduces backpressure, allowing the turbocharger to spool faster, boost power output, and deliver a deeper, more aggressive exhaust note.

Product Specifications

• Material: Handcrafted from premium 304-grade stainless steel, TIG-welded for maximum durability and precision.

• Flanges: CNC-machined from solid stainless steel for perfect OEM fitment and seal integrity.

• Smooth Mandrel Bends: Designed to optimize exhaust gas flow and eliminate turbulence for consistent performance.

Key Features

• Reduced Backpressure: Improved turbo spool and throttle response for instant acceleration.

• Weight Reduction: Lighter than the factory downpipe, enhancing vehicle dynamics.

• Increased Power: Noticeable gains in low and mid-range RPMs.

• Aggressive Sound: Deep, resonant exhaust tone for a motorsport-inspired experience.

Important Notice

This downpipe is catless and intended only for vehicles without an OPF (gasoline particulate filter).
Use is limited to off-road or motorsport applications — installation on public roads may trigger a Check Engine Light (CEL) and does not meet emissions compliance in most regions.

Compatibility

• BMW 1 Series F20/F21 M140i

• BMW 2 Series F22/F23 M240i

• BMW 3 Series F30/F31/F34 340i

• BMW 4 Series F32/F33/F36 440i

• BMW 5 Series G30/G31 540i

Fits only models without OPF (Gasoline Particulate Filter)