I have completed building the air box system that will include the air filter. The air box is attached to my Rotec Throttle Body unit which is also a compact unit and helps to reduce the vertical space of the front lower cowling. The original carburetor that came with the engine was about seven inches deep vertically and would have made for a poorly streamlined front engine cowling. The air box has a clever flapper door at the front for allowing heated air from a heat muff into the intake when required. The door on the hot air intake closes off the ram fresh air, maximizing the hot air volume.
Building up the air box system. The kit is from Vans aircraft which is used on most of their various aircraft. I like the system because it is compact and yet allows ram air and a real good K&N oiled filter. this is a one time purchase round filter which can be used over and over by cleaning and re-oiling. They are widely used on numerous performance cars. It took a bit of time for me to build up the kit but am very happy with the final product.
