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. These 1826 rockers feature a 1.6 ratio for use with 7/16" stud Chevrolet 396-454 Big Block.
For Big Block Chevrolet applications; 1.6" Ratio, 7/16" Stud; Machined billet pushrod seat insert; 8650 steel construction outlasts and outperforms other rockers in accuracy and strength; Ultra Pro Magnum XD Rocker Arm bodies are guaranteed against breakage for life
