Fits 1988 1995 GM Truck 4.3 5.0 5.7L 3Pc Performance Under Drive Pulley 1603 transmission lines Color Unpainted Construction Steel Hardware D290 0463 B Color Unpainted Construction Steel Hardware Use Existing Hardware Hazardous No Universal No Axle Rear Model 35 Front Model 44 Door Any Front Rear Varies with Application Inner Outer Varies with Application Upper Lower N A Left Right N A Lhd Rhd Any Transfer Case Any Transmission Any Genuine Holley quality parts Install a set of BBK performance underdrive pulleys and see an average of 8 15 additional horsepower over the stock pulleys 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