Just buy the headset. The Bose earcups are close to the same if not smaller, the light speed Zulu are 10 mm wider each so will be too big for an already tight helmet. Also the Bose is easier to pull apart. With the Zulu you will need to remove the mic and silicone the hole. The mic cord is long enough to reach where the original mic was. The Bose mic can stay where it is though it may touch the bottom of the helmet. Keep the headband as you may need to resemble to send away for warranty
