Is there a difference between the mufflers on the GT versus GXP?

[mackerman22]

Is there a difference between the mufflers on the GT versus GXP? Is the only difference the mufflers?

[DZ28]

Mufflers are lower restriction and mid-pipe is completely different. I recently sold a GXP and currently own a G8 GT. I've changed exhaust on both cars. The GXP has an H pipe, additional cats, and there is no step down in pipe size mid-way through the system like the G8 GT. Had I not sold my GXP system I wouldn't hesitate to put it under my current GT.

[GotMyG8V8]

Does it look to be a direct mount up, even though there are some differences?

[DZ28]

If I still had my GXP system it would be sitting under my G8 right now; so yes it is a direct bolt in...