I need extreme duty intakes 2.3 11/32 +.250 (#11854-8)
The part numbers for the Xtremealloy valves, 1.88 11/32 exhaust is 11743-8 These are Manley product numbers. I will use other mfg as long as they are of eaqual strength and durability. I need two sets of each.

www.revvalves.com

These are the valves that I use in my 622ci merlin head engine. They use the same material as any "severe duty" valves that Manley uses without the severe price.