you can call them to see what they can do. i am not convinced that ff2's can accommodate really stiff springs. they adjust rebound and compression at the same time. ff2.5's give you 2 way adjustability, ff2's don't. with 2.5's you can create a bias between the two. I really wouldn't bother trying to go too stiff unless you want to track, but who really tracks accords anyways. ff2's should serve you well so long as they are matched to what the were built to take within reason. if you want stiff thats comfortable AND safe, you will have to spend some major money unfortunately on some ohlins or some other exotic stuff.