As far as Race Related goes, you'd have to contact James for a decent estimate. I have no idea what kinda car you are doing this to or anything.

Mine was... very expensive.. hehe.. But mine took a lot of time and I was pretty specific in what I wanted.

In the end I got exactly what I wanted for a price I was willing to pay, but it was probably a lot more than a lot of people spend on it Still cost me less than a off-the-shelf M Roadster cat-back kit, though.