BMW N54 x35i Downpipe

76mm Downpipe without catalyst or particulate filter for the following models with N54 engines:

Type 1:

• BMW 1-Serie E82 135i
• BMW 1-Serie E88 135i
• BMW 3-Serie E90 335i
• BMW 3-Serie E90 335ix
• BMW 3-Serie E91 335i
• BMW 3-Serie E91 335ix
• BMW 3-Serie E92 335i
• BMW 3-Serie E92 335ix
• BMW 3-Serie E93 335i

Suited for versions with 299 and 306hp. 

Replaces OEM nr:

• 18307553594
• 18307553595
• 18307587609
• 18307587610

Type 2:

• BMW 5-Serie E60 535i
• BMW 5-Serie E60 535xi
• BMW 5-Serie E61 535i
• BMW 5-Serie E61 535xi

Suited for versions with 306hp.

Replaces OEM nr:

• 18307565330
• 18307565331

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.