This guy is right on. First generation 4g63 motors have intake ports that are too large. The second generation motors have ports that are about 35% smaller. all the material was added on the port floor. The small port heads are also on the EVO cars.
Funny that most 2g guys think they are upgrading trading for 1g heads.
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want a piece of the yellow car? (buy it)
you have to beat the blue car first
and then you have to take on the IV
my favorite quote
"if the solution is simple, God is answering"