Edelbrock part #77780 Red Roller Rocker arms are designed for small block Ford's using 3/8 studs. This 1.6:1 Ratio, set of 16 rockers are manufactured in the USA from lightweight 7129 grade aluminum. The body is CNC machined then micro polished and anodiz Product Features:0.375, 1.6:1 RatioAccommodates Up To 1.65 in. Diameter Springs7129 Grade Aluminum W/ Red Anodized FinishIncludes Thick-Walled Adjusting Nuts & 4140 Steel Poly LocksSet of 16
