NOT ROAD LEGAL
Supersprint Turbo Downpipe (decat downpipe)
For the Twin-Scroll-Turbo N55 engines (BMW-Name for this version:TwinPower Turbo) fitted on the latest E8x and E9x models.
Models:
BMW E90 335i or 335i xDrive salon / sedan N55
BMW E91 335i or 335i xDrive touring N55
BMW E92 335i or 335i xDrive coupè N55
BMW E93 335i or 335i xDrive cabriolet / convertible N55
BMW E82 135i coupè N55
BMW E88 135i cabriolet / convertible N55
A "plug&play" component that replaces the OEM unit without any adaptation necessary. O2 sensor bungs and brackets match the ones present on the stock component.
The installation of these turbo downpipes involves the elimination of the stock catalytic converter, allowing a great improvement of the free flowing characteristics of the exhaust right downstream of the turbochargers. This brings a sensible performance gain, a reduction in the local temperature and mechanical stress.
The use of free flowing turbo downpipes is highly recommended on tuned cars.
As the catalytic converter has been removed, the O2 sensors placed after it on the stock unit will read incorrect values, and this will turn on the CEL (check engine light) on the dash.
To solve this issue there are three possible solutions:
-To extend the O2 sensor wires, plugging the sensors into the bungs placed after the metallic sports cats on the Supersprint front pipes.
-To deactivate the sensors by reprogramming the ECU
-To fit "microcats" between the sensors and the bungs on the downpipes.
For more information contact our customer services or ask a competent tuner.