Silverhorse Racing Billet Tube Style Shift Boot Retainer for 2005-2014 Mustangs.Use this to tighten your CJ Pony Parts shift knob on the shift lever. Without a jam nut, your shift ball may not be aligned straight when the knob is tightened on the shift lever. This functions as a jam nut while eliminating the gap between your shift knob and shift boot.
Thread size is 12mm x 1.25.
*Does NOT fit 2005-2014 GT500s.
*If you have installed a Steeda shifter in your 2005-2014, check the thread pitch as it may be different.