Cognito 3 Degree Rear Pinion Angle Shim Kit For 1999-2018 Silverado/Sierra 1500 2WD/4WD / 01-10 Silverado/Sierra 2500/3500 2WD/4WD

Used with short wheel base trucks with tall lift where no tapered blocks were available., , Includes 2 shims and 2 center pins to bolt shims to leaf packs. Use for single cab trucks or extended cab short bed, with 4-6 Inch rear lift that has no pinion angle change such as spring Only or straight block