chorps
Enthusiast
I found replacement multivalve heads for the C6 vette that give an extra 100 HP or so to the ls3 by just replacing the 2vl for the 4vl heads. Imagine that with a viper!
If you're referring to the Arao heads, those are frauds from what I've been reading.
This is just a sampling:
http://forums.corvetteforum.com/c6-tech-performance/2809557-arao-32-valve-heads.html
http://forums.corral.net/forums/5-0-5-8-engine-tech/46770-arao-4-valve-heads-update-long.html
http://www.gt40s.com/forum/feedback...raud-arao-engineering-inc-buyer-beware-3.html