i dont think with 31 inch tires u would feel a power loss. But if u were to spend the money and regear, i would do atleast 4.56, because u would problaly go larger later on.
Exactly, wait until you get to 33" tires to regear. Power-wise, there's nothing cost effective that will make a worthwhile difference on your 2.5L... short of a turbocharger or supercharger. All the other stuff like headers, cat-back, etc. are darned expensive for the extremely minor improvement they sometimes make.now i shouldn't bother if i am not going to go up to a 33" tire? what would be that most cost effective way to go?