Description
Engine builders working with Pontiac 400 can use this Race Series intake valve family to choose the required valve dimensions while staying within the correct Manley application group. The selectable configurations in this family are separated by head diameter, overall length, stem diameter, so the final SKU should be chosen from the dimensional requirements of the build.
If the Pontiac 400 cylinder head has been ported, fitted with oversized seats, or changed from its original valvetrain layout, confirm the required valve measurements after machining rather than using a stock-size assumption.
Key Product Details
- Application: Pontiac 400
- Manley Series: Race Series
- Valve Position: Intake
- Product Family Detail: Race Series application focus
- Manufacturer Part Numbers: Vary by selected configuration (2 SKUs in this parent family)
Available Configurations
This parent listing contains multiple selectable Manley SKUs. Choose the configuration that matches the measured engine or cylinder-head specification.
- Head Diameter: 2.110in
- Overall Length: 5.100in, 5.215in
- Stem Diameter: 0.3415in
Package Quantity
Set of 8 valves. The selected configuration is supplied as a 8-piece valve package. This quantity applies to the selected Manley SKU family shown on this product page.
Selection & Fitment Notes
Use the finished cylinder-head setup as the authority for selection. Oversize valves or alternate lengths may require machining and can affect installed height and valvetrain geometry.
Professional engine assembly and measurement are recommended. Product specifications should be confirmed against the selected Manley part number and the requirements of the exact engine build.