Made specifically for 9th Generation (2012 ) Honda Civic Si's:

We've designed a beautiful Delrin® composite shift boot collar (images below) to compliment our F-Bomb shift knob for the 9th Generation (2012 ) Honda Civic Si. Simply slide the collar down the shift lever and then screw on the F-Bomb knob, pull up the shift boot and it will snap in to the collar for an OEM fit and finish! Never before has a company worked this closely with a specific vehicle model to make a product that enhances the look, feel and functionality while retaining the OEM fit and finish of your vehicle.

Please note: The Delrin® shift boot collar was specifically designed for the 2012 Honda Civic Si in conjunction with the F-Bomb shift knob.  It has not been tested on any other vehicle models or in combination with shift knobs other than the GRFXP F-Bomb.  There are no refunds or returns for this product.