Hi. I am interested in doing this and already have a dremmel but my question is what specific bit(s) do I need to do this job?

 

you wanna use a a bit that doesnt have cross patterns on it. Get a single bit carbide grinding stone bit. that is what I used and it didnt take long to grind down the walls. it will not get clogged up as fast with aluminum chips.

 

I do quite a few of these and I prefer a metal cutter. Just make sure you use some kind of oil on it to keep it clean and it will cut faster.

 

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i HIGHLY do not recomend that carbide stone thing... i got 2 of them and they were a waste... The thing you want is what looks like a can with little cutting fins around it... dip it in oil and let'r rip... sorry bottled.. but i had NO success with that carbide bit with the dremmel.. all it did is make things smooth... with the tin can with fins, it ate that EGR wall like a mad man... very impressed with that.. i had to go to Home Depot 4 times and almost get arrested to get these stupid things... but they look nice!! cant wait to get my pics of it almost done...

 

This what you talking about Al, it's what I use.

 

When I'm done with the cutter, I follow it up with a flapwheel sander. It makes it real smooth, a must if you ask me.

 

yep.. exactly 87GTA... ive been using sanding drums to smoth it out.. but its polishing it! hehehe..

 

can someone post some pics of what has to be removed, i know theres something about an egr plate but stil kinda fuzzy, also what kinda gain should i expect

 

Check out Vader's article.http://216.121.161.76/files/PlenumPorting.pdf