Lots of quiet in this muffler! I've been driving my truck for 15 years with double glass, single chamber, dual chamber, dual exhaust, single exhaust, no muffler and stock mufflers. This one in particular is fairly quiet but has a decent sound when heavily throttled. There's not much rumble on the freeway, either, and there won't be that popping misfire sound when the throttle is released. I'm loving the sound at the moment as I've been putting in more freeway miles lately. Powered by a 95 F150 with a 5.8 liter V8.