Skyjacker WS4320 4 Degree Alignment Shim Kit for 3 Inch Wide Leaf Springs

The Skyjacker WS4320 is a precision-engineered 4-degree alignment shim kit designed specifically for 3-inch wide leaf spring applications. This shim kit is essential for correcting pinion angles and restoring proper driveline geometry after lifting your vehicle, helping to eliminate vibration and extend U-joint life.

Key Features:

• Constructed from durable aluminum alloy for lightweight strength and corrosion resistance
• 4-degree angle correction for precise pinion angle adjustment
• Pre-drilled center hole for factory or aftermarket center pins
• Designed for 3-inch wide leaf springs mounted on top of axle
• Includes double mounting pins for secure installation
• Direct fit for 2004 Ford F-150 4x4 models

This shim kit installs between the leaf spring and axle pad to rotate the axle and adjust the pinion angle. Proper pinion angle alignment is critical when installing lift kits to ensure smooth driveline operation and prevent premature wear on drivetrain components. The aluminum alloy construction provides excellent durability while resisting rust and corrosion in harsh conditions.