rosh is correct. there is no tranny differentiations from the '03-'04 and the alternator pulleys are the same throughout the 7th gens...only diff is between gt and gts (and thats only for the belt size)
Bigger header, slightly more power? Perhaps a ricey presumption but people get their headers bored to increase size and thus more flow so wouldn't bigger header equal more flow and therefore a bit more gain?
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