ApexBuilt® BMW F97 X3M & F98 X4M Resonated Race Downpipes (S58, 2020+)

ApexBuilt® BMW F97 X3M & F98 X4M Resonated Race Downpipes offer... • Perfect fitment, guaranteed.  • Drastically improved throttle response, quicker turbo spool, and an aggressive exhaust note. • Estimated gains of 20-25+ wheel horsepower and 40-50+ TQ when installed on a vehicle that is not tuned. • Estimated gains of 60+ HP and 100+ TQ over stock power levels when paired with an aftermarket ECU tune. • T304 stainless steel construction  • Lifetime warranty    PLEASE NOTE: These these parts are for OFF ROAD / RACE USE ONLY . They are not 50 state legal. Any of our catless race downpipes WILL NOT be sold in, or shipped to, the state of California. Aftermarket tune and/or DME unlock required to prevent catalytic deficiency codes.