CTS Turbo Crossover Exhaust Pipe for G80/G82 BMW M3/M4

The left side downpipe connects to a "crossover" pipe that runs beneath the transmission and links up with the mid pipes on the left side. Unfortunately, the stock shape of the crossover pipe is oval to create enough clearance underneath the transmission. This alteration from a round tube to an oval causes turbulence within the pipe, leading to a restriction in exhaust flow. We have developed a replacement crossover pipe that retains the round shape, eliminating the turbulence and restriction caused by the oval design. By doing so, we expect to significantly increase horsepower and torque, enhancing overall performance. Features: Durable 304 food-grade stainless steel, 3″ or 76mm diameter Laser-cut flanges Designed using the latest 3D scanning technology LHD/RHD fitment Exhaust flow simulated with CAD software to ensure optimal flow routing *Please Note All CTS Turbo sales are final.

Fits: BMW S58: M3 (G80/G81), M4 (G82/G83). Confirm your exact car with us before ordering.

Brand: CTS Turbo · Part #: CTS-EXH-TP-0021

• Ships from the brand or distributor, usually in 3–7 business days.
• Free US shipping on orders over $250.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.