Justin wrote: Try part number 20692-65J00. I believe that one should work just fine for the front and rear of the cat. okay, i went and looked at that part at nissan w/ my cat. the opening is not the right size and the flange and gasket do not sit flush. has anyone else installed a Random Tech cat on their car? if so, what gasket did you use, if any at all? TIA Brian 92 SE-R