K20a intake manifold

time ago started builing an intake manifold based on the PRB manifold. due to lack of time i forgot it, but ith some time this week, i redesigned and started again this manifold.
compared to the original prb manifold, gained  48CFM and compared to RSP manifold, gained 26CFM.
i am told that the RRC manifold, the best OEM manifold for a K20A engine, flows about 326CFM. i am close to that numbers, with 324CFM.
this manifold is for a drag race car with a high reving engine(9300RPM), so the runners are short, wider with a bigger plenum, a little more than 2 liter. it's a prototype, so, lets see if works or not.

hand made dome. needs a sanding.

simulating a velocity stack with clay. need to build or buy some.