Stock OEM ITR.

If it helps, read what Omniman has to say on these post. He's the ex-skunk2 head mech guy there. He was the one that made these happan.

"i have seen and done flow bench testing on both itr and skunk2. as well as dyno testing.
i have also done flow bench testing on the extrude honed version of each.

i can tell you this extrude hone makes about 8-10 cfm/runner and the oem mani flows the best out of the 2."

http://www.honda-tech.com/zerothread?id=789078&page=2