If you mean engine noise, I was a little concerned at first. I thought my tune was bad because the engine went from basically silent to clicky clackly like my DRZ used to be, but 7k miles and one valve adjustment later it runs like a top. At idle you can just listen to the cam - only at idle though. At some speeds in certain gears you can hear a little induction noise which is cool. If you mean exhaust noise, well yeah, the open Wings was super loud at first but either it broke in or I got used to it because I don't find it to be that loud anymore unless I'm making it be. I still wanna say the MRD race pipe on my DRZ was louder but honestly don't remember. You should really just wear earplugs anyways and none of this matters.