I was looking in to swapping my heads out on my 5.3 it has the 706 head and the 806 heads gave been milled .010 and cnc ported and polished what kinda gains am I looking at I know I'm gonna loose a little compression
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I was looking in to swapping my heads out on my 5.3 it has the 706 head and the 806 heads gave been milled .010 and cnc ported and polished what kinda gains am I looking at I know I'm gonna loose a little compression