magnaflow mufflers

A lot of factors come into play with drone. I went thru a whole journey of drone and different mufflers. I started out with an Accurate exhuast system with their chamber performace muffler on my 383 Dart. Had a cam with same lift and duration as stock but twice the overlap and no drone. After the restoration and close to stock cam it droned bad with the same exhaust system and intake. Tried Magnaflows, Dynomax turbos and Dynomax VT mufflers. All droned except the VT's were 12 DB less in level. Killed it with branch resonators. There's a thread here covering my drone journey.

One nice thing about Dynomax is they have a performance guarantee on a number of their mufflers. You don't like it and they will buy it back and have UPS pick it up from your house. I did that with the turbo ones.

I'm thinking about putting the Magnaflows back on now that I have killed the drone. The Dynomax VT's have a valve in them so there is some back pressure from the spring valve verses a striaght thru without the valve.