My friend has a HKS can and whenever I got out of his car, I feel my ear buds are dying ever so slightly

 

IT's not that bad. It's an annoyance more than anything. From 2-3k is were the drone kicks in for me. At high RPM's everything is making noise. Like i said from 2-3k it drones and when your cruisiing on the freeway at that rpm you hear the annoying drone. I have to say i have gotten use to it and now think its not too bad. Other people think differently. Listen to it first, that was my mistake.