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Chevrolet C30 (1977-1979
5 V8 1975 - 1978 GMC C25 292/4
Year Make Model Submodel Engine Size 1959 - 1966 Jeep CJ3 1949 - 1958 Jeep Willys CJ-3 1956 - 1958 Jeep Willys CJ-6 1959 - 1966 Jeep CJ5 1955 - 1958 Jeep Willys CJ-5 1959 - 1966 Jeep CJ6 1946 - 1949 Jeep Willys CJ-2 1945 Jeep Willys
0L V8 1984 - 1986 Chevrolet K5 Blazer Silverado 305/5
Fits 1985-87 GM 5.0/5.7 F-Body/GM Truck 3 Pc Performance Under Drive Pulley-1598 brake-line-clip Chevrolet C30 (1977-1979Install a set of BBK performance underdrive pulleys and see an average of 8 15 additional horsepower over the stock pulleys. Under drive pulleys increase engine output by reducing the draw of the engines accessories by slowing them down and reducing the HP they use. Additional and significant performance improvements can be seen by reducing the weight of the pulley versus the original pulley which is why we recommend the BBK CNC Machined billet
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