TCM B58 4.5" Race Downpipe BMW 240i/340i/440i/Supra/X3 F/G Chassis
TCM B58 4.5" Race Downpipe BMW 240i/340i/440i/Supra/X3 F/G Chassis
Product Info
TCM B58 Catless Downpipe — Performance Exhaust Upgrade for BMW & Supra Maximize your B58 engine's potential with the TCM Catless Downpipe, engineered for BMW 240i, 340i, 440i, M340i, M440i, 540i, 640i, 740i, 840i, X3/X4/X5/X6/X7 M40, Z4, and Toyota Supra 3.0L. This direct bolt-on upgrade delivers up to 30HP on stock turbos with improved turbo spool time and throttle response. Built from 304 stainless steel with smooth bends and optimized internal diameter, the catless design eliminates restrictive factory catalytic converter backpressure while maintaining seamless compatibility with stock and aftermarket exhaust systems. Experience increased horsepower, torque, and a more aggressive exhaust note without drone. Fits RWD and AWD B58/B58TU (Gen1 & Gen2) platforms. Direct replacement — no cuts or modifications required. Includes flex section for fitment flexibility across left and right-hand drive vehicles
Fitment Information
House of Apex does our best to ensure we catalog all products as accurately as possible. Please verify fitment with your vehicle to ensure a seamless and smooth install.
For any questions, concerns, or installation help, please email Zac@HouseOfApex.us
Ships directly from the authorized manufacturer partner.
In-stock items: ships within 2–5 business days
Backordered items: typically requires 2–6 weeks
