Holley designed these throttle bodies with all relevant emission provisions and hook–ups for a true 50–State legal
installation. They are engineered for a “bolt–on” installation on stock factory Manifolds for the applications cataloged.
The one barrel throttle bodies have been assigned California Air Resources Board (C.A.R.B.) Executive
Order (E.O.) number D–115–4. The two barrel throttle replacement bodies are considered to be the functional
equivalent of the original equipment throttle body and, as such, are considered to be 50–State legal. Therefore,
the C.A.R.B. E.O. number is not required.
installation. They are engineered for a “bolt–on” installation on stock factory Manifolds for the applications cataloged.
The one barrel throttle bodies have been assigned California Air Resources Board (C.A.R.B.) Executive
Order (E.O.) number D–115–4. The two barrel throttle replacement bodies are considered to be the functional
equivalent of the original equipment throttle body and, as such, are considered to be 50–State legal. Therefore,
the C.A.R.B. E.O. number is not required.
Installation Notes
Fits 1985 1/2 to 1989 2.8L 6 cyl Chevy/GMC S/T Series Truck
Features
- Direct Replacement For OE Units
- 2 in. Throttle Bore
- 42% Area Increase Over Stock TBI
- Including Air Distribution Ring
- Increased Torque and Horsepower up to 25%
- 50 State Legal
Technical Information