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COMP Cams Rockers CS 1.55 7/16in Ultra Pro - cca1808-8 import_2022_03_21_012537 -cc Engine Components::Camshafts 1977-1981 FordBuilt to outlast and outperform in accuracy and strength, the Ultra Pro Magnum XD Rocker Arms are engineered from durable 8650 steel and include a machined billet pushrod seat insert for a wide range of super accurate ratios. A unique and wide ratio range to fit almost any popular application from 1. 5 to 1. 8 in . 5" increments for Chevy and 1. 6 to 1. 73 for various Ford applications is available. These XD rockers are fully rebuildable and boast