TheToad, these are now made and sold by Waldron's Antique Exhaust. They are updated versions of the 1970 GTO VOE mufflers. I made them fit and work on my 69 340 Cuda and when I say quiet, they are dead quiet. No roar, no resonation, no blap, or ring, or farting. Dead quiet. Quieter than even the 340 with the Noise Reduction Package. However, when open, they are as loud as Flowmasters and their copies.
Tom
