Description
This Manley Race Series exhaust valve family is intended for Chevrolet Big Block builds where valve dimensions need to be matched deliberately to the cylinder head, seat work, and valvetrain geometry. The parent listing is distinguished by 1.900"; Head / Part #11707-1, which should be cross-checked against the rest of the engine combination.
If the Chevrolet Big 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 Big Block
- Manley Series: Race Series
- Valve Position: Exhaust
- Title Specification: 1.900"; Head
- Title Specification: Part #11707-1
- Product Family Detail: Race Series application focus
- Manufacturer Part Number: 11707-1
Package Quantity
Sold individually. One valve is supplied per selected SKU. Order the intake or exhaust quantity required for the cylinder-head configuration being assembled. 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.