Ultra Pro Magnum XD Rocker w/ 1.7 Ratio for Chevrolet Big Block w/ 7/16" StudMachined from 8650 steel with a billet pushrod seat insert, these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1820 rocker features a 1. 7 ratio for use with 7 16" stud Chevrolet 396 454 Big Block.
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Machined from 8650 steel with a billet pushrod seat insert, these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. This 1820 rocker features a 1.7 ratio for use with 7/16" stud Chevrolet 396-454 Big Block.
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Ultra Pro Magnum XD Rocker w/ 1.7 Ratio for Chevrolet Big Block w/ 7/16" Stud