aFe Large Bore-HD 4 IN 409 Stainless Steel Downpipe (49-43025-1) 18830 5% FS (+/- 1 PSI)

5% FS (+/- 1 PSI)

It ensures 0% shear loss : Unshearable oil film in extreme conditions

All flywheels are balanced to each spec

5 1988 BMW 735iL Submodel: E32

This Momentum HD intake system was designed around the largest filter possible to allow maximum performance and filtration

aFe Large Bore-HD 4 IN 409 Stainless Steel Downpipe (49-43025-1) 18830 5% FS (+/- 1 PSI)The Large Bore HD down pipe upgrade kit is constructed of mandrel bent 409 stainless steel with OE style hangers and clamps. This 4" down pipe provides maximum flow for increased horsepower, torque and throttle response. The increased air flow also lowers EGT's and helps improve MPG. All hardware and components are included for a no trouble installation. Emissions Disclaimer: This product is not currently CARB exempt and is not available for purchase