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Shims

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The Rubicon Express steel shims are the way to go if you don't want to cut and weld your spring perches to correct driveline angle. Machined from solid steel, the shims are captured by the spring pack centerpin, effectively becoming part of the suspension. They can't spit out and won't crack like slip-on aluminum shims can. We installed the 8-degree shims in the rear, but the company offers 4- and 6-degree versions as well.

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