Unlock the full potential of your BMW B58 Gen 2 G-Series with the CRT Performance Catless Downpipe – engineered for pure performance and sound. Designed specifically for M240i, M340i, M440i, 540i and other B58-powered G-Series models, this downpipe eliminates the restrictive factory catalytic converter to maximize exhaust flow, turbo response, and power delivery while producing an aggressive, motorsport-inspired tone.

Product Specifications

• Material: Premium 304-grade stainless steel, handcrafted and TIG-welded for maximum strength and durability.

• Flanges: CNC-machined from solid stainless steel for perfect OEM fitment and long-term reliability.

• Smooth Mandrel Bends: Designed to minimize turbulence and maximize exhaust gas velocity.

Key Features

• Faster Turbo Response: Significantly reduced backpressure allows the turbo to spool faster and more efficiently.

• Increased Power & Torque: Noticeable performance gains, especially in the low and mid-RPM range.

• Enhanced Exhaust Tone: Deeper, louder, and more aggressive sound — true performance character.

Important Notice

This downpipe is catless and intended only for vehicles without an OPF (Gasoline Particulate Filter).
Use is restricted to off-road or motorsport applications. Installation on public roads may cause a Check Engine Light (CEL) and does not comply with emissions regulations in most regions.

Compatibility

• BMW 2 Series G42 M240i

• BMW 3 Series G20 / G21 M340i

• BMW 4 Series G22 / G23 / G26 M440i

• BMW 5 Series G30 / G31 540i

• BMW 6 Series GT G32 640i

• BMW 7 Series G11 / G12 740i

• BMW 8 Series G06 / G14 / G15 840i

• BMW X3 G01 M40i

• BMW X5 G05 40i

Fits only non-OPF (no particulate filter) vehicles.