which heads flows the most? which provides more power?
which heads is better and why?

 

AFR's have a better runner, flows alot and is still a small runner.

You cannot beat the TSP's for the price though, and they are great heads too.

 

I'd like to see RHS compared to an AFR head. The TSP head is a great deal and will produce good numbers. That being said the AFR is the better head. Its a money question. If you can afford the better head then you get it. The TSP is comparable, very comparable. I went with TSP for the money aspect. IF I get a chance to build a new motor it would be with AFR or RHS or ET heads.