The SPC Performance thrust alignment plate corrects setback and thrust angle on most vehicles with rear leaf springs. To install it, loosen the U-bolts holding the leaf spring to the axle, set the plate between the axle and the leaf spring, and retighten the U-bolts. This is the 3 in. width version, and the kit comes with multiple parts to cover most leaf-spring vehicles, including many early-model passenger cars.
- Type: thrust alignment plate
- Function: corrects setback and thrust angle
- Application: vehicles with rear leaf springs
- Width: 3 in.
- Install: between the axle and leaf spring at the U-bolts
- Includes: multiple parts for broad leaf-spring coverage
- Part number: 63030
FAQ
What does the SPC 63030 plate correct?
It corrects rear axle setback and thrust angle on vehicles with rear leaf springs.
How is it installed?
Loosen the leaf-spring U-bolts, place the plate between the axle and the leaf spring, then retighten the U-bolts.
What width is this version?
This is the 3 in. width plate. SPC also offers a 2-3/8 in. width.

