I don't know what stage 2 cost...as it hasn't been released yet for our cars. Call Roman. My car was used for testing for proto type of vt1 and 2 and they had my car for 4 months. My price isn't an accurate indicator of what the actual price will be. The E46 M3 VT2 kit is out and it's price is on the web site. I think the Z4M is always more expensive because of poor demand and fabrication cost. Pricing questions should be directed to Roman. Cheers
here you go bro. this is the price for the E46 M3 VT2-500. I would guess the Z4M will cost more, but I have absolutely no idea for sure.
http://www.esstuning.com/products/E4...8Gen.2%29.html