im planning on getting this from ebay http://cgi.ebay.com/ebaymotors/OBX-H...=p4506.c0.m245 and i wanna kno if this will bolt on to my dc headers and my greddy evo2 exhaust with no problem i need to know fast because im bout to order it in a few min

 

All your parts are designed to fit your car, and the Cat should be no different. It should be made with the same dimensions as the factory cat so as long as you haven't needed to modify the current exhaust in any way, the cat will bolt in like stock.

 

x2. straight bolt on part. they will typically list a dimension on the posting, or say it is not stock size to allow the buyer to make a decision based off one or the other.