if the engine is near stock and i mean just having I/H/E is not enuf.... usually going turbo or ever a charger is when you see the biggest difference... so in my opinion.. i dont think its worht it unless you have the guts to support it....
its like saying you have a Porche shell but you have a civic engine .... you wont have the pull of a porche.... so no point chaging the shell rite???
i dunno... maybe i didnt explian myself well... oh well... thats what happens when you get no sleep... LOL
