Description
This Severe Duty exhaust valve listing is organized specifically for Chevrolet LS3/L - 99 Small Block, with the available dimensions presented as selectable configurations for easier cylinder-head planning. Use the exact Manley part number shown below to distinguish this product from similar valves offered for the same or related engine family.
The correct Chevrolet LS3/L - 99 Small Block 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 LS3/L - 99 Small Block
- Manley Series: Severe Duty
- Valve Position: Exhaust
- Product Family Detail: Severe Duty application focus
- Manufacturer Part Number: 11661-8
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
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.