ApexBuilt® BMW G-Chassis B58 Gen 2 GESI High-Flow Catted Downpipe (2018+)
ApexBuilt® BMW G-Chassis B58 Gen 2 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*:
2021+ BMW M240i
2019+ BMW G20 M340i
2017+ BMW G30 540i
2018+ BMW G01 X3 M40i
2018+ BMW G02 X4 M40i
*xDrive models also supported.
Zachary D.
Mean sound, added power and great quality!
Jack T.
Sounds great solo if you’re just looking to add some extra oomph to your g2X. Installed on a 2020 m340i and ended up adding an AWE track exhaust. Total exhaust system sounds brutal. 10/10 would recommend to a friend
Bryan C.
Simply top notch quality!!! Welds are perfect and the fact of no CEL is a Plus for my G42.
Zachary D.
Great quality, perfect fit and the sound is AMAZING on the B58. You can tell Apex takes pride in the products they offer.
Thorsten B.
So I installed my Apex Built catted downpipe last weekend and all I can say is that I'm totally impressed with the build quality, fit, and performance. It fit perfectly and several hundred miles of driving haven't produced any CELs. The sound is notably improved, as is performance.
They custom made a version of their downpipe with a 400 cell GESI cat that's EPA approved. They were very pleasant to work with and the price is very reasonable compared to the competition
steven n.
Perfect fitment on my 2019 x3 m40i. Excellent quality and reasonable price. Have been looking for a gesi catted downpipe for a while but everywhere else has ridiculously inflated prices. so glad i finally camera across apexbuilt where quality is top notch with affordable product and shipping to Aus
