Mufflers sound great. Better than the Flowmaster 10 I was planning to buy. They sound low and moderate but are noticeable in normal driving, but in WOT, BEWARE! THEY SCREAM! They crackle nicely at high revs and gurgle under braking/downshifts. This is a good muffler with a deep sound! I use them on the v6 Charger Rally, two of these replace my center mufflers with the resonators removed. I turn heads, women watch and boys fill in. hemi idle is better than rt idle because it's deep and audible. I can't wait to break them down further, but here's a warning. You can burn more gas by using unnecessary choke only to hear them scare everyone around you to death. Sound deters at high speeds!