just curious. hard to search for because it will match the 3.5 to the tip.
i am looking for a canister style 3.5 inlet muffler with a built in tip.

 

RX7.com has a full 3.5 inch exhaust that deletes the cat if thats what your looking for.
http://rx7.com/store/rx7/fdexhaust.html

edit: ^I'm probably wrong since you have an LS1. Are you just looking for the muffler alone?

 

thanks man. yes, just looking for muffler/tip

 

magnaflow.. they have 4in in and out as well. I have a canister from them and the canister is only 6inches long. I weld a vband reducer to a 3in mid pipe, this is much more quiet than the previous set up of apexi n1 dual with the same 3in midpipe.

Check the truck section of their website - I think.