For those that dont know I have the LPP Lt's and ORY with now a stock duramax exhaust. it's actually a little quieter than the vid makes it seem, which is what I was liiking for. Oh and yes its 3.5" w/ a 4" tip
http://i366.photobucket.com/albums/o..._Trucks006.jpg
http://i366.photobucket.com/albums/o.../Trucks008.jpg