There has also beeb discussion on how the Focus RS isn't really the best vehicle to mod with performance enhancements. Definitely look around for that thread or some of the articles that talk about it.
That is something i've seen, with a vehicle like this some people just don't see the need for it to happen since the entire vehicle is engineered to do what its made to do best. I can agree to that. But of course some people want more.
One thing to consider is those looking to take it around a road course track often and for them targeting the suspension would be ideal maybe even power improvements to get them out of the turns to fly down the straights.