BMW N47 Downpipe

63mm Downpipe without catalyst or particulate filter for the following models with N47 engines:

BMW 1-Serie

• BMW 1-Serie E81 116D / 118D / 120D / 123D
• BMW 1-Serie E82 116D / 118D / 120D / 123D
• BMW 1-Serie E87 116D / 118D / 120D / 123D
• BMW 1-Serie E88 116D / 118D / 120D / 123D

Suited for versions with 115, 136, 143, 163, 177 and 204hp.

BMW 3-Serie

• BMW 3-Serie E90 316D / 318D / 320D
• BMW 3-Serie E91 316D / 318D / 320D
• BMW 3-Serie E92 316D / 318D / 320D
• BMW 3-Serie E93 316D / 318D / 320D

Suited for versions with 115, 136 143, 163, 177 and 184hp.

BMW 5-Serie

• BMW 5-Serie E60 520D
• BMW 5-Serie E61 520D

Suited for versions with 177hp.

BMW X1

• BMW X1 E84 18D
• BMW X1 E84 20D

Suited for versions with 143 and 177hp.

Replaces OEM nr:

• 18307797591
• 18307800704
• 18307812279
• 18307812281
• 18307812283
• 18307812285

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.