I posted this over at the 8.1 section but figure i shld probably put here also. I know 2.5 is not the best but for the guys looking for sound and better flow.

http://www.ebay.com/itm/01-06-Chevrolet-GMC-Truck-6-0L-8-1L-Mandrel-Dual-Exhaust-w-MagnaFlow/161085848617?_trksid=p2059210.c100148.m2813&_trkparms=aid%3D333008%26algo%3DRIC.MBE%26ao%3D1%26asc%3D20140127102845%26meid%3D73a6405ee48d4d27a723989c9065a079%26pid%3D100148%26rk%3D3%26rkt%3D4%26mehot%3Dpp%26sd%3D331202819798&rmvSB=true

 

I just bought that same set up just haven't installed it yet. I don't see how you can beat it for $215 shipped and it's made in the USA .