S14 has better flowing intake, and fancy cam timing. And t28. Did I like mine in my s13 absolutely, but it was built sr22det ftw. S14 is really only better if you plan on not doing anything since it comes stock with like 15 more HP. But at the end of the day your decision I loved mine fucking ripped. I now have a stock rb20 and dislike it. Would do anything to trade this car for my old one back
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