Suspension, tires, and brakes are a really good start as huge power isn't the biggest priority in a roadcourse. You'll be able to carry your speed better through the turns and make up distance a lot easier. And of course, after that, more power never hurts so long as you can put it down and keep her off the grass....
Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast?
If you are out to describe the truth, leave elegance to the tailor. Albert Einstein