Our secondary race pipes are made to completely replace the stock catalytic converter eliminating all restrictions. Our secondary race pipes improve throttle response and allow for improved exhaust flow increasing power and torque. ---Noticeably improves throttle response ---Manufactured from high quality T304 grade stainless steel ---Designed to be a direct replacement to the OEM part ---Mandrel bent and fully TIG welded for strength and durability ---Free flowing secondary catalyst replacement to get the most from the 3.0 S55 engine Fitment: BMW M4 F82 / F83 2014-2019 models BMW M3 F80 2014-2018 models Please note: not suitable for models with a GPF/OPF.
