No more split Shims! Relocates the shims from the gear to the housing. Easier to change gears at the track. Severe Duty Pinion Shims - Chevy 12 Bolt Auto Includes special spacer 1901$44.00 Severe Duty Pinion Shims - Chevy 12 Bolt Truck Includes special spacer 1902$44.00 Severe Duty Pinion Shims - Chevy 7.5" (77-81) 1133$12.00 Severe Duty Pinion Shims - Chevy 8.2" (64-72) 1133$12.00 Severe Duty Pinion Shims - Chevy 8.5" 1134$13.00 Severe Duty Pinion Shims - Corvette (63-79) Includes special spacer 1903$44.00 Severe Duty Pinion Shims - Ford 7.5" 1134$13.00 Severe Duty Pinion Shims - Ford 8.8" 1134$13.00 Severe Duty Pinion Shims - Chrysler 8.75" 742 Case 1110$13.00