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Because as I've said a thousand times it seems...our OOTB head flows mid 260's at .500 lift and comes with beehive springs for .600 lift, 8mm Ferrea 6000 series valves, our valve job, surface cut.
Compare that to OOTB eddy heads, their not even close. And they are more $$$ with lesser quality and lesser value.



Just looking at the "as cast" numbers from Ryans site on the various small block heads, it looks like the only head that does better(as cast) than the RHS-X is the Indy 360-1 w/270cfm, at .500 lift. Even the W5 is not as good at .500 lift. So i think i can see why Brian an the OP are excited about this economical head. True, it does'nt have the potential of most aluminum heads, but i think it fills an important niche for those guys that wanna upgrade to a very affordable performance head.