The previous owner of my 2002 buell blast did a wack job putting a straight pipe on and obviously when i took it out to drive it it backfired and sputtered/ coughed like hell so I parked it and started taking it apart, so i took the POS exhaust straight pipe off and the studs on the manifold were almost completely stripped and the gasket ? ( im guessing) around the exhaust manifold was completely screwed so my question is where can i get a replacement or how can i fix it?