Hollow Thrush Mufflers (vintage?)
My '74 Duster has a pair of the Thrush stickers on the Quarter Windows (I transplanted '70-72 Windows into the car, simply to gain the Metal/Chrome Handles and those windows had Thrush stickers on them)
The Irony of it was, I was running Thrush style "Mufflers" on it. A Pair of Louvered "Glasspacks" (If you could even call them Glasspacks). Paid about $11 each for them (new) in 2006 (still cost about $11 today), 12" Overall length, 2.5" Inlet/Outet.
I have a pair of vintage Thrush's on my '73 6-71 Blown 340 Duster, and I pulled into a parking lot one day and the guy in the parking space beside me says "Well you sure wouldn't be able to sneak up on anyone with that car." :D With the Rumble of the 340 and the Whine of the Blower, it definitely makes its presence known