Coffin Mufflers

Just picked up a couple of these from my buddy's muffler shop. They are going to be run on a 69 Dodge Dart that is currently running a set of Flowmaster 40's. The car runs 10.4-10.6 on a single stage NOS kit. From what I have been told by others that have switched from Flowmasters or whatever other performance mufflers that they have had..its been a daylight and dark improvement.
The 69 Dart is running the 21-22 at the Firebird raceway to see what improvements is gained with the new Coffin Mufflers. Here is the website for a look see..

www.thecoffinmuffler.com

http://rides.webshots.com/video/3092265440044859391hgOnoA

This is some sound clips

So far this is the muffler that is going on my son's 68 Dart

Rick