Description
Manley packages these Severe Duty intake valves for Chevrolet Big Block Stock 3/8"; Stem Diameter around the measurements that matter during cylinder-head setup, rather than treating every valve size as a separate shopping path. Use the exact Manley part number shown below to distinguish this product from similar valves offered for the same or related engine family.
If the Chevrolet Big Block Stock 3/8"; Stem Diameter 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 Big Block Stock 3/8"; Stem Diameter
- Manley Series: Severe Duty
- Valve Position: Intake
- Product Family Detail: Severe Duty application focus
- Manufacturer Part Number: 11520-8
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
Valve fitment should be verified from the cylinder head itself; check the required head size, stem size, overall length, seat work, and valvetrain geometry rather than relying on engine name alone.
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.