i personally love REALLY LOUD pipes, it just sounds cool and you rip by your friends and they know it's you becuase of your pie. i have a t-4 on my 400ex and it's pretty loud, but i'm gonna go buy a ct or sparks pipe becuase they are waay louder. but i'm not only gettin it because it's louder the pipe is better all-around. when you really think about it quads are NOTHING compared to a sled. a sled with a stinger can be heard for miles. so i dunno what you guys are complaining about. just my two cents.