Was not planning on changing out the headlight. Will get rid of the stock turn signals at some point. Planning on covering the forks with the Kewl Metal Fork tubes and going to bullet led turn signals on the front. Haven't decided what to do with the back yet.
It is the Pro One oil cooler. Wasn't installed for benefit. Steel frame bikes have the triangular oil cooler tucked within the frame, down low. The non-steel frames have the rectangular cooler mounted in front of the frame, up high. Ground pounders are too phat to work with the stock oil cooler on the steel frames so you have to relocate the cooler. No need to relocate on the non-steel frames.
I have no clue on the specs if the Pro One is better than stock and I don't care. It adds to the unique look of the bike.
Check the Pro One site for information on performance.