Direct-fit Wagner downpipe for B58C engines with OEM particulate filter (OPF/GPF) - no coding or remap needed for basic installation. Built from 3.5in SS304 stainless steel with OEM-matching flanges and includes gasket set.
200 cell racing catalyst balances flow, sound and emissions compliance better than 100 or 300 cell alternatives
Sharper throttle response, stronger mid-range torque and reduced turbo lag - ideal for fast-road or track-day use
Fits G20/G21 M340i, G30/G31 540i, G32 640i, G14/G15/G16 840i, G29 Z4 M40i and Toyota GR Supra A90 (OPF/GPF models only)
Replaces BMW 18329897313; part number: 500001037.200CPI
