Does anyone know for sure if the X303s have stock intake and exhaust port locations? Also, are the plugs GT40 or GT40P style?
Yes they have the stock intake & exh. Don't know whether they use GT40 or "P" plug locations though....... Friend has a set, had plug-to-header clearance issues, and the heads didn't really pick him up a whole lot, considering the investment.....but everyone's combo is different, and his may not have been optimal for those heads.