Swirl polished stainless exhaust valves 1.680″ head diameter with a 45° face, overall length 4.705″. Hard tip and hard chromed stems for high performance street, towing and all fuels when using hard alloy exhaust seats for unleaded fuels. Use #1453 seats. Set of 8.
Stainless Posi-Flow exhaust valves. 1.680″ head diameter, 11/32″ stem, 5/16″ undercut, 45° face, and the overall length is 4.705″. Recommended for high performance applications. For use with our hardened exhaust valve seat #1453 for unleaded fuel. (Can also be used without hardened valve seats.) 350-455 V8’s. 6% flow increase over our 5290 valves. Set of 8.