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The Prothane rear spring and shackle bushing kit for 1981–1987 GM K30 trucks is supplied in black and includes a frame shackle bushing with a 1.5" outside diameter. This kit replaces original rubber bushings at the rear spring and shackle mount points to restore correct spacing and secure attachment. It’s intended as a direct replacement for the K30 applications listed.
Prothane 81-87 GM K30 Rear Spring & Shackle Bushings (w/ 1.5in OD Frame Shackle Bush) - Black
