Originally Posted by MustangGT0405

I put in glass packs and I think it sounds quieter than without them, but it might be in my head because the tone was so improved that I just liked it better.

If you are interested I have a set of Pypes High flow cats that I had on my car for less than 1k miles if you want them. $80 + shipping. (Have to be welded in.)

I added cats and resonators at the same time and it quieted the car too much for me so i pulled off the cats. They were easier to get out than the resonators. I defineately recommend doing one or the other.

PM me if you want those cats.