I'm using the summit glasspacks as resonators on mine.

my truck had just the chambered "powersticks" at first, and while I loved the aggressive sound, the way it would crackle at high RPM, and under WOT, it would resonate and drone at cruise speeds. I added a single 12" glass pack behind the powersticks.

idle was noticeably quieter, the higher frequencies were toned down, and the overall sound was lower, deeper it's still pretty loud at WOT, but the drone is gone.