odel jones at fast motions called me to tell me when he put the 2.19int. valve in the rpm head it picked up about 12cfm from .300 up. he said from .200 to .300 it was substantially more. all he did was install the valve and change the seat angle and blend it in. for those of you that don't know, odel does the heads for us to get his name on the car. so far it works out fine{ his work is great and i don't have to eat aluminum chips and alu.dust}. if i am going to port stuff now, i would rather it be intakes. or at least get paid for it