APEXBUILT G-Chassis B58 GESI Catted Downpipe BMW G42/G20/G30 X3/4/5/6/7

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
  BMW G21 M440i  

  BMW G42 M240i  
• BMW Z4 G29   (01/2018 — 12/2019)
• BMW G30 540i  (10/2015 — 06/2019)
• BMW G01 X3 M40i  (10/2016 — 07/2023)
• BMW G02 X4 M40i  (03/2017 — 07/2023)
• BMW G05 X5 40i   (10/2017 — 01/2020)
• BMW G06 X6 40i   (06/2018 — 01/2020)
• BMW G07 X7 40i   (11/2017 — 01/2020)

*xDrive models also supported

Replaces OEM BMW Part Number(s):
• 18328682788
• 18328660990