[wvstar]

Was able to check under my new '01 GT this weekend while getting new tires and oil change.

The car has a BBK O/R x pipe and a cat-back system with either flowmasters or magnaflow mufflers...but I'm not sure which. The mufflers were maybe 18Lx12Wx4T. Got any idea which they would be given those measurements? Or are there any other identifying marks that might clue me in to what I actually have?

Not that it matters really...would just like to know.

[FunkyBoss]

Both Flowmaster and Magnaflow mufflers are stamped with their name, can't miss it (unless it's facing up). I had some flowmaster rip-offs when I first got my GT that had no markings, that could be what you have.