Junkyard mufflers

The yards here usually have some good picks. Almost every mustang has Flowmasters. Most truck have aftermarket duals also. $10.86 + a 1.75 core and tax. Depends on you sound preference.
This is pretty much where I was at. I have long glass packs on there now that have been long burnt out. I put the less radical cam in so I just wanted to be quieter. I don't mind losing a little horsepower for the street I got 10 times more than anybody should need.