15g's sound like they fit the bill perfectly for you then. They can make 450-500ish on race gas and good tune and probably 400ish awhp on pumpgas and 15-17psi from what I've read. I don't have any dyno numbers on mine yet, but I'm still working on getting the tune better. 450cc's and 550cc's are perfect to support 15g turbos as well. I'm still stock heads and cams, but have a forged bottom end
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