CTS Turbo 4.5" Race Downpipe for BMW B58 1/2/3/4/5/7 Series RWD & XDrive - All Generations

CTS Turbo's 4.5-inch race downpipe is purpose-built for BMW B58 applications spanning the 1, 2, 3, 4, 5 and 7 Series in both rear-wheel drive and XDrive configurations. The enlarged 4.5-inch diameter eliminates the restrictive factory catalytic converter, significantly improving exhaust gas flow and reducing backpressure. Compatible with all B58 generations including M140i, M240i and 340i models, this race-spec downpipe is designed for dedicated track vehicles or off-road use where emissions compliance isn't required. Professional installation is essential for optimal fitment and performance.