does anyone know what the difference in length betwen then civic 4 door and civic hatch is. i just picked up a 4door today but the ehxuast system is completly hosed. if i can use mine now great. if i have to buy a new system well not so great.

You can use parts of yours depending on what you have, but if it's a full bolt on kit you'll have to cut it. I know behind the rear tires is longer, can't remember what the wheelbase difference is though.