Spindles & Steering Arms
While we went for CPP's drop spindle, the upgrade is not necessary. The earlier steering arms used a 7/16 bolt, while later GM models switched to a 1/2-inch bolt on the steering arms. The Brembo kit comes with the 1/2-inch bolts. If a sharp enough drill bit is in your toolbox, the earlier steering arms with the 7/16 holes can be drilled out to 1/2 inch. A $69 option when ordering the Brembo kit is the new 1/2-inch black-coated steering arms.