Mustang Shift Knob Group Buy! Posted by admin on July 8, 2015 Posted in: Boomba Racing. Running a group buy now for #Ford #Mustang 6-spd weighted shift knobs! Find our thread over at www.mustang6g.com or copy and paste http://mustang6g.com/forums/showthread.php?t=26842 Posts navigation ← First kid on the block with our new catch can installed Weekend Giveaway!! →