I recently installed a 2004 GT motor in my 1996 mustang but I have a bad exhaust leak. Basically I left the stock manifolds (2004) and used my UPR-X pipe (the one i used on my 96) and I noticed that the Driver side has an exhaust leak. It seems that the X-pipe flange is to big!
Is there a gasket that goes in between (like a donut shape gasket)? Any solutions to my problem? Thanx