new geometry on the front end. New spindle design and fit. i think you will find your old zrp spindles are not as plug and play as you think...
There is always more HP to be gained. Manufacturers are bound by sounds laws, emission laws, etc. They upgrade the tech to try and reach all that, but this motor is a power plant and I would expect we see options to really maximize the potential. Although I don't think we will see any real designs/dynos until december. Drop a pipe/can on her for 10lb weight loss and gain 5-10 hp would be my guess.
