before my magnaflow went on, I had manifolds, no cat, and flowmaster, at idle and under 2k, it sounded decent, loud, but decent. Then the longtubes, ory, and magnaflow went on, much quieter inside and out at idle, I don't have to shut the car off in drivetrus, and it sounded good everywhere, and I could still sneek around when I wanted to. Now, with 1.6 rollers in there, it completely changed the sound, and about a year and a half of driving it (about12-13k miles) and it's still quiet at idle and crusing, but a touch louder, and at wot, it's nasty, I mean like loud gonna f-up your world kinda nasty. I've found, the more you get down on it, the louder it starts to get, I'm really happy I went with the magnaflow.