Well, the carbon fiber hood on my KR started out with a price of $18k or $19k and then came down to less than $10k a year later and I think they are now available from Shelby for KR owners for about $4k and replicas can be found for less than $1k. I would expect that at initial start up the price of the ground effects would be fairly high (depending on what they are made out of) to cover the development costs, but should come down over time as those costs are amortized and as competitors enter the market with similar options. I would be very interested in a set at a reasonable cost (reasonable has its own definition for each buyer, though).