Well a lot can be gained. Plenty of experimentation thru out the forum. Everyone has their way to make HP. I went my way, and others have went theirs. Most will peak close to 370 at the wheels, meaning over 400 at the crank. It only costs $$$$$ to get there. I have done 2 so with no plans to do much more. I have 1 more mod each for the my 2 cars and it is what it is. No more experimenting, and no more modding. It holds it's own with just about anything except triple figure cars. Never going to compete with store bought race cars like the GT-R, or ZL-1...but for the 50K I have invested in 2 cars, I am having fun with them and don't mind driving them anywhere.