I've always thought the 458 had rubbish grip and suffered from understeer anyways, but I know in the last update they remodeled all the tires and changed some of the grip settings!
I think you need to make sure your wheel is working right and check the brake gamma settings might help you sort your brake issues, also check with another car if you're getting the same issues might be a game thing, I'll pull my wheel out in the morning and see if i have any problems
Ps need for speed underground, best modifying car game EVER!! I would pay £1000 if they remade it with HD graphics and a map which is 5 times the size, and a R33 skyline :lol: