Here's an NOS Walker muffler part #21595. It fits a ton of 1967 to 72 Dodge and Plymouth B-body big block dual cars so rather than type them all in, I added the application photos showing all the numerous models including 383 all the way to 426 apps. GTX, Super Bee, Road Runners etc.

This is a Vintage Walker muffler in excellent condition as seen. Box was still sealed until I opened it for the photos and it is overboxed for shipping. MADE IN THE USA part! Not a current one size fits all foreign made muffler! Bid is for the one you see in the pics and I dont have a mate for it. THANX