COBB Weighted Transmission Shift Knob Color:Black 5″ downpipe upgrade is THE

5″ downpipe upgrade is THE best bang for the buck mod available for your N55 135i & 335i/xi

Billet aluminum meth/sensor bung with NPT tap (TB inlet pipe)

The duct is made of a carbon fiber

Throughout the development process we have strived to improve the efficiency and performance of the EA888 GEN3 engine

Uncomfortable bouncing and stiffness are reduced

COBB Weighted Transmission Shift Knob Color:Black 5″ downpipe upgrade is THEThe Weighted COBB Knob is designed to keep those extended shifting sessions exhilarating. The billet stainless steel base insert provides a weight similar to OEM knobs and is internally threaded to provide a tight fit onto the shifter which won't come loose in the most frenzied of gear changes. The delrin upper section ensures comfortable gear changes in the most extreme climates. Both Race Red and Black lower trim rings are included. This knob weighs