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Peterbilt air leaf adjusting shims from SPC change thrust angle and toe by placing the shim between the spring hanger and the spring. Sold as six shims per box, these plates are sized for heavy‑duty tandem applications and are included in SPC’s shim assortment. Use them where spring hanger placement is the alignment control point; follow vehicle procedures during installation.
SPC Performance Peterbilt Shim 1/16in. (6)
