I've tried normal dremel stones and a carbide bit but neither can hardly mark the exhaust diffuser welded into my S4 NA's exhaust port, but I need to grind them down a little for my port job. Anyone have a suggestion as far as what to do? I don't want to remove the sleeves completely . . anyone got any TII sleeves from junked housings you could sell? How about a diamond tipped dremel bit, would that work?



I know that Judge Ito has ported NA exhaust ports . . but he is seldom present here anymore.

what do those things even do and why don't turbos have them? what would happen if you just took them out?

i grinded mine out with a straight tip carbide bit for a dremel. took a little time but worked fine. i completely removed mine. turbo sleeves would probably be easier if you have them available to you. i think they are on there because it quiets down noise.

I don't think it hurts anything to remove them. My friend took them out on his bridged 13brew with a t-70 and had no problems. I have removed them on my 12a peripheral project.

Youre thinking of the wrong. All rotaries have exhaust sleeves, which is what you are talkign about. N/a's have a diffuser in the sleeve to reduce noise. Thats whay he was talking about.

so umm i forgot to ask you where u got you rims done???

You asked on my thread about them, and I replied there. I did them myself, in my garage.

so what would happen if you took the hole sleave out???? and how do they come out?

haha i guess i never checked back, nice



you would need a sleeve in there to have your car operate correctly. you can remove them by tig'ing the roll pins on the side of the housings and pullin them out.

Yeah I just used a carbide drill bit on a drill press and it ate right through the roll pin with no problem. One of the sleeves took a little persuasion but the other came out fairly easily.