To optimize the AIS you really need to do the ZooDad mod and make sure the rubber flap is not partially covering the air inlet of the AIS. Well worth the effort. And a very good choice for a filter. Now all you need is exhaust. The BTM is a good choice but a full 4 inch system is a definite improvement.
Got Gauges???
FOMOGO
Got Gauges???
FOMOGO