No. The Stage 1 kit is specific for the turbo engines. For the '03 turbo you get a new PCM and fuel injectors, for the '04 models you just get a new PCM as they come from the factory with the larger fuel injectors. You don't change any of the plumbing, the turbo, intercooler, or anything else. The Stage 1 kit really just has a much differently mapped computer controlling everything.
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