Correct your pinion angle.
An incorrect pinion angle can rob precious horsepower, as well as cause launch problems and parts breakage. These Mopar Performance rear axle shim packages allow you to correct the driveshaft-to-pinion angle on most any rear wheel drive vehicle to the recommended 5-7 degrees. These packages include two each of 1, 2, and 3 degree tapered steel shims.

Axle Shims, Steel, 3 Degree, 2 in. Wide, Kit