Lot's of differences between the two, but the 4g63 is supposed to be just as bulletproof as the SR20. I don't know much about the 4G, but i have a friend with a 91 talon with a built 4G63 that is supposed to run 11's on a t3/t4 turbo 720cc injectors @ 13lbs boost. I know you can get as much as 400 rwhp out of the SR on stock internals, I don't know about the 4G63 though...anyways, welcome to the board.
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Branden Rosa
1990 RB240sx
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