More Power Tuning has aftermarket suspension on their own truck and knows that sometimes, not everything lines up quite right when using mass-produced shock/spring combinations that lower or raise thr truck. This completely changes the suspension's original geometry and thus the dynamic driveability of the truck while daily driving or pushing it to the limit... For this, we have sourced parts from SPC to compensate for these alignment variances that can cause unwanted road noise, vibration, and harshness (NVH). With the ability to level-out your suspension with a proper alignment, this Pinion Angle Shim kit from SPC ensures the rear-end pinion angle can be adjusted to proper-specs.