A unique combination of roller rockers in one package that consists of 8 each of 1.6 ratio rockers and 8 each of 1.7 ratio rockers. Fits Ford Aluminum Head Small Block - Pedestal Mount - For 1977-1994 302HO and 351W Hydraulic and Roller Cams. Rid your engine of internal friction with roller-tipped rocker arms. The race-proven full needle bearing, fulcrum and roller tip not only unleash horsepower, they also lengthen valve train component life and reduce wear and tear on valve stem tips. Precision machined to insure consistency and ratio accuracy. Sold as one set.