This is a do-it-yourself kit to make your transmission crossmember (6c bar) removable. Brackets fit around 1 5/8" tubing. NHRA legal kit for all full bodied dragcars. The kit consists of (4) mounting brackets, (8) 3/8" x 1" 24 grade 8 bolts, (16) 3/8" AN washers, and (8) 3/8" 24 half height nylocks.