Revolutionary new filter with an aluminium shield which helps to funnel as much air into the filter as possible. The shield helps to create a vortex to maximise the air flow through the filter, it also acts as a heat shield to protect it from engine heat. The cold air ducting kit can also be fitted to all Twister part numbers. This will ensure as much cold air as possible is directed into the filter, thus improving performance. The Twister is available in five sizes, three colours and can also be ordered with Carbon fibre or perspex shield.