Here's an NOS Walker muffler part#22134  WHICH REPLACES Mopar#4004911&4004919. It fits the following apps:1979 Chrysler Newport, New Yorker&Cordoba w/318 eng and Dodge Magnum&St Regis w/318.  Dimensions are 4X10 1/2Tri-flow 26" Overall, 21 1/2" shell, 2 1/4" I.D. in and outlets with side inlet and center outlet. Not the "Mopar dimpled" ends! Thisis the only app for this muffler.

This is a Vintage Walker muffler and as you can see shy of a few tiny handling dents, it's perfect! Just opened it for the pics and this is a MADE IN THE USA part! Not a current one size fits all foreign made muffler!

    WATCH OTHER AUCTIONS OR INQUIRE FOR MANY OTHER BUICK AND OTHER MAKE EXHAUST PARTS. IN THE 20 YEARS I HAVE BEEN SELLING THIS STUFF, NEVER A RETURN OR COMPLAINT! WALKER IS GREAT STUFF!

 CAN ALSO SEND FULL SIZE PIC ON REQUEST.  THANX