Active Autowerke BMW B58N Gen 3 GESI Catted Downpipe – 2025+ X3 M50 / X5 40i / X7 40i / 540i
$1,999.00
Active Autowerke BMW B58N Gen 3 GESI Catted Downpipe – 2025+ X3 M50 / X5 40i / X7 40i / 540i
$1,999.00
Active Autowerke B58N Gen 3 GESI Catted Downpipe
Designed for the verified U.S.-market BMW B58N applications listed below, this Active Autowerke catted downpipe uses large-diameter stainless-steel construction and a GESI high-flow catalytic converter. No performance tune is required.
Features
- 5-inch high-flow GESI catalytic converter
- 5-inch 304 stainless-steel piping that transitions through a stainless flex section to an 80 mm factory exhaust connection
- Ultra-high-flow 400-cell-per-square-inch catalyst
- Casted upper stainless-steel V-band for precise fitment
- TIG-welded 304 stainless-steel construction with 1.5 mm wall thickness
- Bolt-on installation with no cutting or welding required
- Designed for quicker turbo spool and reduced exhaust backpressure
- Rated by the manufacturer for applications up to 1,000 horsepower and temperatures up to 1,500°F
- Manufacturer states the catalyst can reach operating efficiency within nine seconds of startup
- Made in Miami, Florida
Verified Fitment
- 2025-2026 BMW X3 M50 xDrive (G45)
- 2025-2026 BMW X5 xDrive40i (G05 LCI)
- 2025-2026 BMW X7 xDrive40i (G07)
- 2025-2026 BMW 540i xDrive (G60)
U.S.-market vehicles only. This application does not fit the M340i or M440i B58N Gen 3 platform, which incorporates a GPF into the downpipe.
Included
- Active Autowerke B58N Gen 3 GESI catted downpipe
- Turbo flange gasket
Emissions and Legal Notice
This catalytic converter is not legal for use on vehicles registered in California. Federal law prohibits tampering with emissions-control devices. Confirm compliance with all federal, state, and local requirements before ordering or installing.
Warranty
The manufacturer states a five-year/50,000-mile warranty on the shell and tube ends and a two-year/25,000-mile warranty on the catalytic core for the original purchaser. Excessive burble beyond the stock calibration can void the catalytic-converter warranty.