Description
This Manley Race Series exhaust valve family is intended for Chevrolet Small Block builds where valve dimensions need to be matched deliberately to the cylinder head, seat work, and valvetrain geometry. 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 Chevrolet Small Block 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: Chevrolet Small Block
- Manley Series: Race Series
- Valve Position: Exhaust
- Product Family Detail: Severe Duty application focus
- Product Family Detail: Race Series application focus
- Manufacturer Part Numbers: Vary by selected configuration (21 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: 1.600in, 1.500in, 1.625in
- Overall Length: 14 selectable values (including 5.050in, 5.036in, 5.021in, 5.121in, 5.565in, 5.015in)
- Stem Diameter: 0.3136in, 0.3415in, 0.3110in, 0.2740in
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
Before purchase, compare the selected valve dimensions with your head manufacturer or engine builder’s specification, including stem diameter, valve length, seat diameter, and keeper arrangement.
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.