I'm starting to plan out a shot at 200mph (Texas Mile), and I've got a basic shopping list together (chain guard, ram air seals, ceramic bearings in addition to my Alienhead and Cheese tune). I can't decide if I need the Double Bubble or not. Does anyone have any experience with whether or not these increase top speed? I've heard some people swear they help, but I've also seen a few 200mph threads with the stockers. Looking to squeeze out every last bit that I can. Any other top speed tips are much appreciated!