As I was looking for exhaust options on my ‘68 Polara 383 I decided to go back to the stock single exhaust. As I was researching part numbers I discovered that the rear tailpipe was actually a resonator. This intrigued me. So I did some searching and found a NOS tailpipe with resonator PN 2856361 and ordered it. I could have just as easily put on a regular tailpipe but after I saw this I had to have it. It is 2-1/4” out of the muffler and bent to clear the axle before going into a 2” inlet on the resonator. Inside the resonator it continues to pass through at 2”, but the first half has holes drilled allowing some of the exhaust pressure into the outer chamber which is about 2-3/4” in diameter. Exit is 2” as well.