Active Autowerke BMW B58N M340i M440i GESI Catted Downpipe (2025 and newer)
$2,499.00
Active Autowerke BMW B58N M340i M440i GESI Catted Downpipe (2025 and newer)
Regular price
$2,499.00
Regular price
Sale price
$2,499.00
Unit price
per
Active Autowerke BMW B58N M340i M440i GESI Catted Downpipe (2025 and newer)
$2,499.00
Active Autowerke B58N Gen-3 GESI catted downpipe for U.S.-spec 2025+ BMW M340i/xDrive and M440i/xDrive applications.
Highlights
- 5-inch 304 stainless-steel piping with 1.5 mm wall thickness, tapering to an 80 mm connection for the OEM exhaust system.
- 5-inch GESI high-flow catalytic converter.
- Turbo-flange gasket included.
- Vendor states that no performance tune is needed.
Fitment
2025–2026 U.S.-spec BMW M340i/xDrive (G20) and M440i/xDrive (G22/G23/G26) with B58B30O1 engine code. Not verified for non-U.S., RHD, or OPF-equipped vehicles.
Before ordering
- Vendor notes that replacing the factory GPF downpipe requires dropping the subframe and estimates 9–10 hours of labor.
- Confirm vehicle configuration and local emissions requirements before purchase or installation.
Warranty
Vendor warranty: 5 years/50,000 miles on shell and tube ends, and 2 years/25,000 miles on the catalytic core for the original purchaser. The vendor states that excessive burble beyond stock can void the warranty.