SPC wedge-style pinion angle shim for Ford F-150 two-hole rear spring applications, fitted between the rear spring and axle to change pinion angle. Intended to realign the driveline after lowering or lifting, this shim provides a rear adjustment range of ±2.50° and is typically installed one per axle where correcting pinion angle reduces vibration and driveline stress.
SPC Performance F-150 PINION ANGLE SHIMS