If you are running a b20b bottom end with b16 head & type r gearbox, you won't really need to change pistons and cams unless you have a spare 5-6k lying around. IMO not worth all that money for minimal gains. Would rather stick a GT35R on it with that money, as this is your best choice for kw gains/money spent value. OEM built b20b/b16 will most likely net you between 120 & 130kw, built b20b/b16 with high comp pistons, race cam, e85 etc will give you approx 140-150kw and boosting an OEM built b20b/b16 will give you 170kw+
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