shop estimated around 550$ - $1200. it was leaking out of both the front and rear exhaust manifolds. do you guys think ill relize any little performance gain after getting the leak fixed?

 

I'm curious to know also, I need the same thing done.

 

Same here

 

Try to get the manifolds from a scrap yard or off of someone parting out their car. I got mine for about $60 shipped from DanNY. If I do the labor myself, I'm only out $60 + the $5 or so it cost me for penetrating oil. It's a huge difference from the $1,400 that the dealer quoted me. And your engine should run smoother and have an increase in mpg after having it done, because thats what I lost when the crack appeared.