ATR has been out of business for years now. Richard Clark bought up all of the remaining stock way back when. However, he’s since gone through all of that. Not sure on this so someone can correct if I’m wrong? However, I think Mr. Clark helped developed the 3” SS GN1 mufflers (which are supposed to be a copy of the Pit Bulls)!
You might try begging for a set in the Parts Wanted Section? However, Pit Bull Mufflers are by far the best muffler ever made for our cars and they sound incredible in 2.5” configuration too! So, good luck finding the Unicorn Bones (for less than a brand new GN1 - 3” polished set up)!
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