BMW N57X 550DX 750DX Downpipe

76mm Downpipe without catalyst or particulate filter for the following models with N57X engines:

• BMW 5-Serie F10 550DX
• BMW 5-Serie F11 550DX
• BMW 7-Serie F01 750DX
• BMW 7-Serie F02 750DX

Suited for versions with 381hp. 

Replaces OEM nr:

• 18308516696

By installing a larger bore downpipe backpressure in the exhaust drops which makes the turbo rev easier which means the turbo starts building pressure at lower RPM's. If during shifting the pressure drops it also builds back pressure faster. 

By only installing a larger diameter downpipe the horsepower usually rises between 15 and 20hp and torque also goes up by 25 to 30Nm. Combining a downpipe with chiptuning brings even more extra power.

A software update (chiptuning) would be advised.

This product is not intended for use on the open road.