Brian,
You ain't making it easy on me are you. Ok so what your saying is because one flows 4oo cfm out of the box and the other 270 cfm out of the box.......that's worth $4,ooo extra. They both are cast out of the same Aluminum the same way, and both are using a CNC machine to machine them. I do understand that one (DCI) is set up for a roller cam and the other (KRE) a hyd. cam so the springs are way better in the DCI head but I still don't see $4,000 difference in them. You tell me why there is a $4,000 differance.