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I just picked up this kind of exhaust last week. Its plently loud enough for me. I think its all subjective to each person tho. I had a Tsudo (knock off greddy i think) exhaust that i picked up from a local member and i liked it at first but after a week and a 2 hour highway drive i wanted something quieter. Basicly like most have said in other threads, there is a quiet hum on the highway - music will cover it up tho. I hear it on start up - more now since its cold in OH. And i hear it from right under 2k to maybe 3.5k rpms. Anything above 4k and my intake is louder. So far i still love it. There are a couple threads on here with other reviews also (thats what helped me out)