Harrop has a long history in Australian motorsport, and we have made just about every conceivable part for every application. These pulleys are precision machined here at Harrop HQ from 6000 series billets and are in supplied in the as machined finish. Manufactured to suit the venerable cast iron Holden V8 engines, they were originally designed and made for competition in the Australian Touring Car Championship, and have been used by many famous teams throughout the years. This driven pulley is single V-Belt configuration to suit large bearing Holden water pumps. Engine Applications: Holden V8, 253 - 308 with large bearing water pump.