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Ultra Pro Magnum Rocker Arm Set w/ 1.6 Ratio for Chevrolet V6 w/ 3/8" Stud; These Ultra Pro Magnum rockers are made of black oxide coated 8650 chromemoly steel that can withstand up to 850 lbs of spring pressure. Featuring a 1.6 ratio, these rockers fit Chevrolet V6 with a 3/8" diameter stud.

Ultra ARC Rocker Set w/ 1.6 Ratio for Chevrolet 200-262 V6 w/ 7/16" Stud; Constructed in the USA after FEA analysis, the Ultra ARC rocker withstands up to 700 lbs pressure while improving power and stability. This 19005 rocker features a 1.6 ratio for use with 7/16" stud Chevrolet V6.

Ultra Pro Magnum Rocker Arm Set w/ 1.6 Ratio for Chevrolet SBC w/ 3/8" Stud; These Ultra Pro Magnum rockers are made of black oxide coated 8650 chromemoly steel that can withstand up to 850 lbs of spring pressure. Featuring a 1.6 ratio, these rockers fit Chevrolet Small Blocks with a 3/8" diameter stud.

Ultra ARC Rocker Set w/ 1.6 Ratio for Chevrolet Small Block w/ 7/16" Stud; Constructed in the USA after FEA analysis, the Ultra ARC rocker withstands up to 700 lbs pressure while improving power and stability. This 19005 rocker features a 1.6 ratio for use with 7/16" stud Chevrolet 265-400 Small Block.

Ultra Pro Magnum Rocker Arm Set of 8 w/ 1.6 Ratio for Chevrolet SBC w/ 3/8" Stud; 3/8" Stud, 1.6 Ratio

Ultra Pro Magnum Rocker Arm w/ 1.52 Ratio for Chevrolet V6 and SBC w/ 7/16" Stud; This Ultra Pro Magnum rocker is made of black oxide coated 8650 chromemoly steel that can withstand up to 850 lbs of spring pressure. Featuring a 1.52 ratio, this rocker fits Chevrolet Small Block and V6 with a 7/16" diameter stud.

Ultra Pro Magnum Rocker Arm Set w/ 1.52 Ratio for Chevrolet V6 w/ 7/16" Stud; These Ultra Pro Magnum rockers are made of black oxide coated 8650 chromemoly steel that can withstand up to 850 lbs of spring pressure. Featuring a 1.52 ratio, these rockers fit Chevrolet V6 with a 7/16" diameter stud.

Ultra ARC Break-In Rocker w/ 1.3 Ratio for Chevrolet SBC w/ 7/16" Stud; Perfect for initial break-in, this Ultra ARC rocker for Chevrolet Small Block reduces valve lift by limiting the rocker ratio to 1.3. A great asset to engine builders who prefer to limit the valve lift over removing an inner spring.

1.125" Tall Polylock for High Energy Rockers w/ 7/16" Stud; This 1.125" tall polylock fits our 7/16" High Energy Die Cast Aluminum roller rocker arms. Perfect for moderate lift and spring pressure applications.

Ultra Pro Magnum Rocker Arm Set w/ 1.52 Ratio for Chevrolet SBC w/ 7/16" Stud; These Ultra Pro Magnum rockers are made of black oxide coated 8650 chromemoly steel that can withstand up to 850 lbs of spring pressure. Featuring a 1.52 ratio, these rockers fit Chevrolet Small Blocks with a 7/16" diameter stud.

Ultra ARC Break-In Rocker Set w/ 1.3 Ratio for Chevrolet V6 w/ 7/16" Stud; 7/16" Stud, 1.3 Ratio

1.125" Tall Polylock Set for High Energy Rockers w/ 7/16" Stud; These 1.125" tall polylocks fit our 7/16" High Energy Die Cast Aluminum roller rocker arms. Perfect for moderate lift and spring pressure applications.