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.
• No CEL or other emissionsrelated error codes, guaranteed (no ECU tune required).
• 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 Fort Myers, Florida.
• Lifetime warranty.
PLEASE NOTE:
These parts are for OFF ROAD / RACE USE ONLY. NOT CARB certified, not street legal in CA.
Ignacio A.
Awesone.. perfect fiftment..
Cheers from CHILE..... Far away US.. but happy my Catted Donwpipe M240i 2023
Nathan K.
Had the downpipe installed with no tune for now but it’s already changed how the car performs to the better! Looking forward to seeing how the car does with a tune and this downpipe.
Priti R.
Amazing downpipe! It sounds fantastic and you can definitely notice the difference in performance. As well as increase is exhaust sound! Spend the money on a good downpipe and get apex!
Sumit S.
I love this catted downpipe!! Prefect fit and prefect performance boost as well can’t go wrong with apex built! Thank you guys!
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
