Description
For Chevrolet LT - 1 1.590 Head Diameter cylinder-head work, this Manley Extreme Duty Pro Flo exhaust valve listing groups the available dimensional choices under one application-specific product family. 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 LT - 1 1.590 Head Diameter 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 LT - 1 1.590 Head Diameter
- Manley Series: Extreme Duty Pro Flo
- Valve Position: Exhaust
- Manufacturer Part Number: 12349-8
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.