ApexBuilt® BMW F90 M5 & F9X M8 Catless Race Downpipes (S63R, 2018+)
ApexBuilt® F9X M5/M8 Catless Race Downpipes offer...
• Industry-leading build quality.
• Perfect fitment, guaranteed.
• Drastically improved throttle response, quicker turbo spool, and an aggressive exhaust note versus OEM.
• Estimated gains of 35-45+ wheel horsepower and 55-60+ TQ when installed on a vehicle that is not tuned.
• Estimated gains of 65+ HP and 70+ TQ over stock power levels when paired with an aftermarket ECU tune.
• TIG-welded T304 stainless steel construction, assembled by hand in Naples FL.
• Lifetime warranty.
These these parts are for OFF ROAD / RACE USE ONLY. We advise you to run a tune on your vehicle for best results.