ApexBuilt BMW G80 M3 & G82 M4 High-Flow Catted Downpipes
ApexBuilt® G8X M3/M4 HFC Downpipes offer...
• No check engine light on factory-tuned vehicles.
• 50 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 Naples FL.
• GESI GEN1 UHO metal-core 300cpsi 4.5" cats, rated for 500-800hp applications.
• 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.
Read more about GESI cats: https://gsportbygesi.com/high-performance-catalytic-converters/g-sport-catalytic-converter-technology/