Active Autowerke BMW S58 F97/F98 X3M/X4M Downpipes w Aflow CATs 1M resulting in substantial HP and

resulting in substantial HP and torque gains

Active AFlow Series Catalytic Converters are EPA registered and compliant in 49 states and fully OBD2 compliant

Eight-Rib Pulley System

a solid 15+hp boost and key gains in the midrange with the valve open while the sound comes out non intrusive with a rich mellow tone with the valve closed

Active Autowerke BMW S58 F97/F98 X3M/X4M Downpipes w Aflow CATs 1M resulting in substantial HP andNO PERFORMANCE TUNE NEEDED. NOTE: Fitment applies to US model cars only unless specifically stated. We cannot guarantee fitment to non US model cars. Active Autowerke BMW X3M S58 Downpipes BMW introduced a new valvetronic, single turbo version of its direct injection engine for the later F Chassis models beginning in 2016 and continues into the G Chassis models the evolution to the S58 engine continues with the twin turbo variant used in the M series