 Individual exhaust pipes of a tuned length empty into large collector pipes and no mufflers are used.No cooling fan is required or used, and the water pump speed is reduced 30% by the use of a smaller crankshaft pulley.A small, 5-ampere generator is used in conjunction with a lightweight aircraft type battery In addition to the aluminum water pump mentioned previously, the engine cooling system consists of an aluminum radiator mounted forward of the driver, and two oil cooler radiators mounted one on each side of the main radiator.