I have both an eiger and a Z 400 and was getting ready to put a yosh system on the Z 400 so I was think hmmmm, what if I tryed the z's muff on the eiger? Anyone have any thoughts?

 

I would think it would flow more freely. How much fabricating are you going to have to do to get it to match the existing brackets?
I just installed my fmf powerline yesterday and love it, but if I would have had a free option like you do I'd definitely give it a shot.

 

Wire feed welder takes care of the bracket, I am planning on the yosh set up fo the z but haven't purchased it yet.

 

How much power increase did you get?

 

I can't quantify it without a dyno, but from feel it was well worth it. It throws you back in your seat a lot more, and breaks traction like crazy. (mines an auto 4X4 like yours).
I'd still be curious to see what the z pipe does though.

 

Free is good as long as it works.