My car came with the Roush AB off the lot and I've made some changes since then. Roush AB alone is somewhat loud, mainly only at WOT. Once I had the resonators deleted the car got real damn loud. Now I with the O/R X pipe the car is kind of retarded. I'm going to make some vids this week with the new set up but here are two that show what the sound was like with resonators deleted. Idle is actually pretty quiet with these mufflers on any set up you use.