ApexBuilt® BMW F90 M5 & F92/F93 M8 GESI High-Flow Catted Downpipes (S63R, 2018+)
ApexBuilt® F9X M5/M8 GESI High-Flow Catted Downpipes offer...
- No check engine light on factory-tuned vehicles.
- 49 state emissions legal*• Industry-leading build quality.
- Perfect fitment, guaranteed.
- Drastically improved throttle response, quicker turbo spool, and an aggressive exhaust note versus OEM.
- Estimated gains of 20-25+ wheel horsepower and 40-50+ TQ when installed on a vehicle that is not tuned.
- Estimated gains of 45+ HP and 60+ TQ over stock power levels when paired with an aftermarket ECU tune.
- TIG-welded T304 stainless steel construction, assembled by hand in Fort Myers, FL.
- EPA approved GESI GEN2 UHO metal-core 400cpsi 4.5" cats, rated for 500-800hp applications & road legal in 49 states.
- Lifetime warranty.
These downpipes will not be sold or shipped to the state of California. GESI 400cpsi cats are EPA approved, but not CARB approved – meaning they're street legal in all 49 states EXCEPT the state of California. Read more about GESI cats: https://gsportbygesi.com/high-performance-catalytic-converters/g-sport-catalytic-converter-technology/