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COMP Cams Ultra Pro Magnum XD 1.73 ratio rocker is a stud-mount rocker for Chevrolet 396–454 Big Block engines using 7/16" studs. Machined from 8650 steel with a billet pushrod seat insert, the rebuildable design supports accurate valve motion under high loads. Precision-sorted needle bearings and hardened roller tips improve load distribution and reduce wear, allowing these rockers to withstand heavy spring pressures in racing and high-demand street applications.
COMP Cams Rocker CB 1.73 7/16in Ultra Pro
