Exhaust Valves
O.E.M. style replacement exhaust valves 1.502″ head diameter, 30° face, overall length 4.740″. 307 Olds, 1977-80 350, all 403. Set of 8
O.E.M. style replacement exhaust valves 1.562″ head diameter, 45° face, overall length 4.735″. 350-455 Olds. Set of 8.
O.E.M. style replacement exhaust valves 1.625″ head diameter, 45° face, overall length 4.690″. 350-455 Olds. Set of 8.
O.E.M. style replacement exhaust valves 1.625″ head diameter, 30° face, overall length 4.680″. Fits some Olds 455 models 1973-76. Set of 8.
O.E.M. style replacement exhaust valves 1.687″ head diameter, 30º face, overall length 4.670″. Fits some Olds 455 models 1973-76. Set of 8.
Swirl polished stainless steel exhaust valves, 1.710″ O.D. 45° face for all cylinder heads 350 to 455, overall length 4.715″. Set of 8.
Swirl polished Posi-Flow stainless exhaust valves 1.680 head diameter, 45° face, overall length 4.710″. 5/16″ undercut, hard tip & hard-chromed stems. 330-455 Olds V8’s 1964-1980. 6% flow increase. Set of 8.
1.625″ Hard chrome stainless steel street exhaust valves, 45° face, overall length 4.695″. Set of 8.
Swirl polished stainless exhaust valves, hard tip & hard chromed stems. 1.710″ head diameter, 45° face, overall length 4.710″. Olds 350-455 for high performance street, towing and all fuels. Set of 8.
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.
Stainless Posi-Flow exhaust valves 1.710″ x 11/32″ stem, 5/16″ undercut with a 45° face. .100″ longer on the stem. Other specs the same as the 5370 intake valves (overall length 4.850″). 6% flow increase (being undercut). Set of 8.
