Ultra Pro Magnum XD Roller Rocker Arms, 7/16" Stud Dia, 1.7 Ratio CO1820-16 Turbo Flanges AF9511-2000

AF9511-2000

Specifically designed for Holden 253

OVERFLOW TANK BLACK 8

Sized by the outside diameter

and 8 cylinder engines (2 - 4 pulse per revolution ignition signals)with points

Ultra Pro Magnum XD Roller Rocker Arms, 7/16" Stud Dia, 1.7 Ratio CO1820-16 Turbo Flanges AF9511-2000Ultra Pro Magnum XD Roller Rocker Arms, 7 16" Stud Dia, 1. 7 RatioSuit Big Block Chevy CO1820 16 1820 16 Built 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. 7 in . 5 increments for Chevy and 1. 6