These SPC Performance shims adjust drive axle pinion angle on Peterbilt Low Air Leaf suspensions with Z-springs. The OE aluminum shim can break down under load, so these are made from zinc to hold up in heavy duty service.

SPC Performance 35015 Peterbilt Pinion Shim Features:

• 1.0 degree pinion angle change
• For Peterbilt Low Air Leaf suspensions with Z-springs
• Zinc construction replaces the OE aluminum shim
• Tapers from 0.142 in. to 0.290 in. thick
• Sold as a pair