ApexBuilt® BMW G-Chassis B58 Gen 1 GESI High-Flow Catted Downpipes offer...
• Industry-leading build quality.
• Perfect fitment, guaranteed.
• Drastically improved throttle response, quicker turbo spool, and an aggressive exhaust note versus OEM.
• GESI 400-Cell UHO Gen2 cats, resulting in 49 state emissions compliance
• Estimated gains of 20-25+ wheel horsepower and 30-35+ TQ when installed on a vehicle that is not tuned.
• Estimated gains of 45+ HP and 50+ 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.
PLEASE NOTE:
These these parts are for OFF ROAD / RACE USE ONLY. We advise you to run a tune on your vehicle for best results. NOT CARB certified, not street legal in CA.
Fits the following vehicles:
2016-2019 BMW's with B58 gen 1 engine. This will be vehicles names ending in 40
so 340 x5 40i etc.
*xDrive models also supported
Replaces OEM BMW Part Number(s):
• 18328682788
• 18328660990
