Description
This Manley Severe Duty exhaust valve family is intended for Chevrolet Small Block Stainless Steel builds where valve dimensions need to be matched deliberately to the cylinder head, seat work, and valvetrain geometry. 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 Small Block Stainless Steel 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 Stainless Steel
- Manley Series: Severe Duty
- Valve Position: Exhaust
- Product Family Detail: Severe Duty application focus
- Manufacturer Part Number: 11858-8
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
Confirm head diameter, overall length, stem diameter, keeper/groove style, seat compatibility, and installed-height requirements with your cylinder-head specification before ordering.
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.