Now the Gasket that comes off of the turbo is a re-useable copper one right? I am doing a down pipe with a buddy and he didnt buy a new one, he said we could re use the old one. Now I bought new, did I waste my money? Or is it 6 in one hand a half dozen in the other? So question is since we are doin this tonight, should he get a new gasket or will old one be fine?