"the cost will be $100 shipped which will include new correct length bolts and new EGR valve gaskets. "
How much was it?Mr. Smalsers EGR bypass works. I am running it on my J35A3 in my 6th gen. No CEL from it after 1.5 years, no problems from it.
As far as gaining HP from it? umm, I say none. might gain some during cooler weather since you are not putting hot gases back into the engine.
The real benefit you gain from it, is eliminating the recirculation of exhaust gases back into the engine, which clog it up over a period of time. Add 2 catch cans, for the front and rear head, along with the bypass EGR and it will help your top end stay much cleaner.
How much was it?
generic catch cans? any specific brands you recommend?
I paid for one of these in Aug of 2010....NVA-AV6 made a custom aluminum piece w/ a breather filter that pulled in fresh air and kept the EGR in place. This prevented the ECU from throwing a CEL. I would try contacting him to see how much he would charge for one. I'd probably be interested in getting one also.
EDIT: here's his thread: bye-bye-egr