Muffler Options

TTI's system requires a same side offset/offset muffler for their system if you are using their system with relocated springs (usualy it's offset inlet with center outlet)

Dynomax has discontinued this muffler. Flowmaster still makes them. (40 series and 40 ultra) I don't really want a flowmaster. I don't like the sound under WOT and the interior resonance is anoying.

The Dynomax is a straight through design with a perforated tube. Essentially a glaspack with a larger body.

How bad are glasspacks for interior noise? and how bad are they outside compared to the 40's flowmasters?