The CHi 3Vs are killer heads. These are the heads that won this year's Engine Master Challenge. Everyone I talk to says they flow excellent right out of the box. Some people are seeing 335 and 340 at .700 out off the box. Kaase was able to get his to flow 350+. Kaase emailed me a few weeks back and said he rebuilt his winning engine and it then made 712HP using these heads on 92 pump gas (12.5:1 compression). These really are very good heads.
http://www.chiheads.com/heads_02.html
Andy
http://www.piratesofhorsepower.com