BMW M3 G80 G81 & M4 G82 G83 Single Mid Pipe OPF/GPF Bypass by Milltek (2020+)Unleash the full potential of your BMW with the Milltek Sport Single Mid Pipe. Transform the driving experience of your BMW G80 M3 or G82 M4 with this high performance Single Mid Pipe by Milltek Sport. Designed to connect directly to the primary catalytic converters, this mid pipe replaces secondary cats and removes OPF GPF sections. Available in Non resonated, Resonated, or X Pipe Centre Sections, each option brings a unique acoustic character to