Holley bolt on throttle bodies fit 1986-91 5.0L V8 Full Size Chevy and GMC Trucks. They are engineered for a "bolt-on" installation on stock factory manifolds for the applications cataloged. This replacement throttle body is considered to be the functional equivalent of the original equipment throttle body with a 42% Area Increase Over Stock TBI with Increased Torque and Horsepower up to 25%.
