Description
This Severe Duty intake valve listing is organized specifically for Chevrolet Big Block 2.300 Head Diameter .5.494"; Stem, with the available dimensions presented as selectable configurations for easier cylinder-head planning. The parent listing is distinguished by Part #12854-1, which should be cross-checked against the rest of the engine combination.
The correct Chevrolet Big Block 2.300 Head Diameter .5.494"; Stem valve is the one that matches the finished head. Stem clearance, seat contact, installed height, spring package, and keeper location should all be checked during assembly.
Key Product Details
- Application: Chevrolet Big Block 2.300 Head Diameter .5.494"; Stem
- Manley Series: Severe Duty
- Valve Position: Intake
- Title Specification: Part #12854-1
- Product Family Detail: Severe Duty application focus
- Manufacturer Part Number: 12854-1
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
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.