is the silencer ring the cone shaped piece that you see first after you take the intake tube off?

 

don't touch the silencer ring on the 6.7 apparently unlike the 5.9 they actually serve a purpose, not quite sure exactly what it is but i wouldn't mess with it

 

the silencer ring covers up 3 long jelly bean shaped holes... they go torwards the midle of the inducer... as air moves from the tip of the inducer torwards the outer edge some of it is bled off thru these holes... the ring doesnt silence so much as it reduces the turbulence which is where the whistle comes from... less turbulence = smoother air flow which equals more power (theoretically) i doubt there is any gain or loss that can be felt other than the whistle... if there is a special purpose for the 6.7 then i'd most deffinately leave it... put an aftermarket intake on it and an exhaust and i'm sure you'll be plenty happy with the ring in place

 

so just wondering is this a fact on the silencer ring serving a purpose. Cuz i am getting ready to do my friends but if it serves a purpose i wont do it any input would help

 

leave the ring in and just put a cai on you will get all the turbo whistle you want

 

Those holes in the housing and the direction ring are for surge control. Most garret turbos have these reliefs built into them as well for surge at low turbo shaft speed. I wouldn't touch it.