Fits: 1987 Chevrolet Blazer 1985–1986 Chevrolet K5 Blazer 1985–1986 Chevrolet C10 1985–1986 Chevrolet C10 Suburban 1985–1986 Chevrolet C20 1985–1986 Chevrolet C20 Suburban 1985–1986 Chevrolet C30 1985–1987 Chevrolet Camaro 1985–1987 Chevrolet Caprice 1985 Chevrolet Impala 1985–1986 Chevrolet K10 1985–1986 Chevrolet K10 Suburban 1985–1986 Chevrolet K20 1985–1986 Chevrolet K20 Suburban 1985–1986 Chevrolet K30 1985–1987 Chevrolet Monte Carlo 1987 Chevrolet R10 1987 Chevrolet R10 Suburban 1987–1988 Chevrolet R20 1987 Chevrolet R20 Suburban 1987 Chevrolet R30 1987 Chevrolet V10 1987 Chevrolet V20 1987 Chevrolet V30 1985–1986 GMC C1500 1985–1986 GMC C2500 1985–1986 GMC C3500 1985–1986 GMC K1500 1985–1986 GMC K2500 1985–1986 GMC K3500 1987 GMC R1500 1987 GMC R1500 Suburban 1987 GMC R2500 1987 GMC R3500 1987 GMC V1500 1987 GMC V2500 1987 GMC V3500 1985–1987 Pontiac Firebird BBK1598Pulleys - Crank, UnderdriveInstall 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 aluminum pulley kits for maximum horsepower gains. ALL BBK pulley kits are designed as direct bolt on replacements for the current factory pulleys and retain full cooling and charging characteristics. BBK under drive pulley kits are vehicle specific and each kit comes with complete installation instructions and allow the re-use of existing serpentine belts.BBK Performance underdrive pulley kits are built from aircraft-quality, computer-machined steel or aluminum alloy. By reducing the speed of the accessories, these underdrive pulleys free up an average of 8 to 15 hp, while retaining full cooling and charging characteristics. Most pulley kits can be bolted on in less than 30 minutes.
