if you want 450-600hp, the answer is simple IMHO, rb25... or if you have the patience and fabrication skills , rb26 w/ single turbo in s14. Id say go with the Rb25. I personally wouldnt want 450-600hp on a 4 clyinder... you are pushing it to its limits. but then again, if i wanted a 450-600 hp car, it would definitely not be a 240sx.
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