Milltek OPF/GPF Bypass Non-Resonated (Louder) For Millek Sport System - BMW G80 | G81 M3 | G82 M4 CSL “B-Tube” technology – Unlike a

“B-Tube” technology – Unlike a regular oval shape “O” type radiator tube

GPF/OPF must be removed when installing downpipes

OEM # 17117522119 Make  Model Chassis Code BMW 120i E81 / E87 BMW 125i E82 / E88 BMW 128i E82 / E88 BMW 130i E81 / E87 BMW 320i(si) E90 / E91/ E92/ E93 BMW 323i E90 / E91/ E92/ E93 BMW 325i(xi) E90 / E91/ E92/ E93 BMW 328i(xi) E90 / E91/ E92/ E93 BMW 330i(xi) E90 / E91/ E92/ E93 BMW M3 E90 / E92 / E93 BMW X1 25iX E84

if the original or aftermarket wheels are missing that last optical "kick"

Milltek OPF/GPF Bypass Non-Resonated (Louder) For Millek Sport System - BMW G80 | G81 M3 | G82 M4 CSL “B-Tube” technology – Unlike aOPF GPF Bypass Non Resonated (Louder) Fits to OE Downpipes & Milltek Sport OPF GPF Back System Only Requires OPF Bypass Module or Stage 2 ECU Tune Our range of Cat Back systems are perfectly suited to cater for anyone looking to improve their sound and aesthetics, designed as a direct replacement for the original system, available in multiple configurations enabling the owner to choose the increase in volume of their exhaust and or add a more suitably