I love the EVO 2, even with headers and HFC, it still rang in 4 1/2 decibels under the california limit (at 5200 rpm) on my 5th gen. Its low and deep and it sounds so nice that I like to turn off the radio when I drive just so I can listen to it. The best thing that I love about this exhaust is that when vtec kicks in I can hear the engine over the exhaust, gotta love it!