Active Autowerke BMW B58 M240i 340i M340i 440i M440i X5-40i X3-40i X3-M40i X7-40i 540i 640i 740i Active AFlow Catted Downpipe (2024 and older) 535i This exhaust system upgrade was

This exhaust system upgrade was designed and engineered to work with most after-market exhaust systems/mufflers on the market today with only a single cut needed in the stock mid-pipe

Equal length design eliminates the pulsing sound caused by the unequal length down pipes

Up to 150whp Horspower gains throughout RPM range

year-2017-make-bmw-model-740i

single mid-pipe or rear-section solutions

Active Autowerke BMW B58 M240i 340i M340i 440i M440i X5-40i X3-40i X3-M40i X7-40i 540i 640i 740i Active AFlow Catted Downpipe (2024 and older) 535i This exhaust system upgrade wasNO PERFORMANCE TUNE NEEDED. Active Autowerke BMW B58 Catted Downpipe now includes turbo flange gasket SHIPPING NOW. Please note that we install the gasket into the downpipe flange as some customers were damaging the gasket on installation. NOTE: Fitment applies to US model cars only unless specifically stated. We cannot guarantee fitment to non US model cars. BMW introduced a new valvet ronic, single turbo version of its direct injection engine for