Boost Monkey Replacment C-Clip for N54/N55 charge pipes. This will fit stock and any after market charge pipe that retains the factory c-clip. Compatibility <br>2012-2015 E84 <br> X1 35i 2008-2012 E82/E88 <br> 135i N54 & N55 including 1M 2007-2013 E90/E91/E92/E93 <br> 335i / 335xi including 335is