The fuel system is probably the bigest change from 97 to 98. The 98 has a returnless fuel system. This means that rather than the fuel regulator just rerouting the fuel back to the tank, the computer must control part of this function. But still, this would only affect supercharger kits I would think (FMU wont work). Technically, I would think everything that would work on a 97 would work on a 98. Maybe they just like to pick on you 98 guys?
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