Shelby GT500 Performance Pac - Packing Heat - Tech
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SLP is more than happy to perform the install for you in its shop, but for those do-it-yourselfers, an upper pulley installation kit will be needed to remove the press-on stock pulley. The new upper pulley measures out to 2.70 inches, and will kick the boost level up to around 12 psi. View Related Article
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