Here is the pricing for a similar E46 M3 Eisenmann exhuast system with 83mm tips....
Eisenmann Exhaust for the BMW M3 (e46) - 4x83mm double-walled round tips $2,467.80
Other cheaper options available of course but this is the most like the E92 versions out right now...
http://www.beastpower.com/Merchant2/...ode=bmw-m3-e46
Jason