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Ultra Pro Magnum XD Rocker w/ 1.5 Ratio for Chevrolet SBC w/ 1/2" Stud
these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1810 rocker features a 1.55 ratio for use with 1/2" stud Chevrolet V6 and 265-400 Small Block.