Active Autowerke BMW B58N M340i M440i AFlow Catted Downpipe (2025 and newer) Catted DP - option to add gasket:Catted DP w turbo flange gasket Quicker turbo spool

Quicker turbo spool

out-of-sync turbocharger sound that many owners have complained about

u00a0The connection to the throttle body is a CNC machined part to duplicate the factory fit as well making a tight

There are also plans for a future resonator upgrade for those who prefer a smoother sound to their exhaust systems

Up to 80 Ft / LBs gains Rear wheel FT/LBs measured on the dyno

Active Autowerke BMW B58N M340i M440i AFlow Catted Downpipe (2025 and newer) Catted DP - option to add gasket:Catted DP w turbo flange gasket Quicker turbo spoolNO PERFORMANCE TUNE NEEDED. Active Autowerke BMW B58N Gen 3 Catted Downpipe this is for M340 and M440 B58N Gen 3 which also incorporates a new GPF into the downpipe. NOTE that to remove the stock GPF downpipe requires 9 to 10 hours of labor as the subframe needs to be dropped. NOTE: Fitment applies to US model cars only unless specifically stated. We cannot guarantee fitment to non US model cars. BMW introduced a new valvetronic, single turbo version