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Can someone tell me where I can find full flow manifolds that look just like the rams head 350 manifolds. I was told there is a manufacturer that makes a manifold that replaces the exisiting and it look the same but with opened up insides. Did I hear right and has anyone tried them? Also how much?
I read an article by David Vizard, he says you can "port" rams horn manifolds, I did a set for myself, I don't have access to a dyno, and can't really tell a differance. But from what I read they will flow about 70% of what headers will. I just used a hand held grinder.
Another idea is to send them to extrude hone, they run an abrasive media through them, and port them from the inside out. I have read lots about them, and they seem to flow very good, but they are expensive to have done (I think they quoted me about $500.00 for a set)
Good Luck