That's more what I'm looking for. Like I said, I've heard some guys on this board trashing the iron heads and claiming the aluminums get twice the hp. I figured for 1/3rd the price I would seriously consider the irons. I am planning on staying naturally aspirated for now so that sounds good red82GT. Does anyone know about what hp difference I would be looking at iron GT40's vs. AFR 165's with the same setup?
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