I have always sworn by Wiseco pistons, best out there in my opinion. I think the improvements come more from the increase in compression than the increase in displacement. the 904 is the easiest way to go requiring no machine work. I think one of the kits needs the cases hogged out for the larger dia. cyl. if I remember right and the other 2 are stroker kits requiring crank work.

All that being said, personally I'm sticking with my stock bore until I need a rebuild.

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