After listening to these cars with glasspacks on youtube, dear god have mine got to go...
When I bought mine it came with glasspacks too... f'n lame... Initially I replaced them with a MAC o/r h-pipe and MAC flowpath cat-back. This setup sounded f'n awesome and mean. However, at the time I was DD'ing the Mustang and I got sick of not being able to hear myself think. Anyways, I then replaced teh o/r h with a Magnaflow catted x-pipe and I actually think the catted x-pipe sounds better. One day I may change out the MAC cat-back for Magnapacks... I <3 magnapacks