Gasket size
 

Had to separate my nameless fp/op 2.5" from 3.0" perrin catback to fit my new header in, .recently checked and yeah there is a leak there now kus i used the same gasket (i wasnt expecting to take them apart) so im wondering if http://www.ft86speedfactory.com/suba...l#.Vi-vSl88KnM this gasket will work. If not what gasket do i need?