that's most likely a no name china made header. Sometimes they fit fine, sometimes they dont. the most common one members go with is an OBX
http://www.ebay.com/itm/OBX-Racing-...its=Model:Protege&hash=item2ed1af59f1&vxp=mtr
i'd also make sure your front and rear motor mounts arent broken. broken mounts will crack your header