Muffler only replacement

[Mudfrog]

Factory size on the Tahoe's are 2.75". It's going to be tough finding a 2.75" aftermarket muffler. They typically go from 2.5" to 3". You can do it with reducers but a shop can make it look more seamless.

I don't have the exact specs on the factory muffler but the OE style replacement that I carry measures 2.75" in / out, Center / Offset, 23" body and 27" overall. That might give you a starting place.

I'll be putting a 22" long 5" x 11" MagnaFlow or MagnaFlow style muffler on mine, it will give it a nice deep rumble and there should not be much drone.

 

[Zumwalt]

Finally did mine, 03 Tahoe 4.8 auto, stock muffler replace with Thrush glasspack 3"in/out, 25", WWAAAYYYY better, im lovin it, 32.99 muffler, 55 install. welded.
http://youtu.be/EPIsHvF31r4