Description
Manley packages these Extreme Duty Pro Flo exhaust valves for Chevrolet LS1/LS2 4.923"; / 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.
For Chevrolet LS1/LS2 4.923"; /, valve diameter changes can alter seat work and chamber/shrouding relationships, while alternate overall lengths can change installed height and rocker geometry.
Key Product Details
- Application: Chevrolet LS1/LS2 4.923"; /
- Manley Series: Extreme Duty Pro Flo
- Valve Position: Exhaust
- Manufacturer Part Number: 11681-8
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.