Silencer ring
#1
#2
#3
#4
#6
The silencer ring is a something that the engineers put in front of the turbo to decrease the turbo whistle. Having it on or taking it off has no affect on the performance of your turbo. Someone else might back me up here but I believe that it has no affect on your warranty either. So if you want to hear that sweet turbo whistle take off the silence ring. If you really want to hear if you prolly going to have to put on an aftermarket intake. AFE AEM S&B K&N something like that. Hope this helps.
#7
#9
#10