i have 245/40/18 BFG KDWII's on my STi, putting down close to 400whp. Traction I would give a solid 9 for a street tire. They still do very god in the wet, braking is on point, and obviously with AWD acceleration isn't too much of an issue. I couldn't be happier with them. The only tire I would go to after these is a Toyo R-888, but thats nothing but a DOT semi-slick, with little to no wet traction.