Holley Camaro or Firebird 85-88 5.7L TPI Throttle Body 52mm. Shipping is not included. Does your engine seem like it's out of breath? You can increase engine breathing with a Holley high-air-flow throttle body! Fully CNC machined from 6061 billet aluminum, these new Holley throttle bodies are designed to use the stock TPS and IAC to simplify installation. These throttle bodies are even anodized clear for good looks. They also include all the necessary vacuum ports and linkage to facilitate installation. Don't get left in the dust. New Holley high-flow throttle bodies are the ticket to ride. NOTE: Some manifold machining may be required to correctly port-match the throttle body to the intake.