Patent ID: 7100730

Claim:
A method of reducing engine throttle noise audible to an operator positioned in a driving position on a snowmobile, comprising the steps of: providing an engine for the snowmobile comprising at least two throttle body assemblies comprising at least two or more inlet tubes; positioning an air box assembly in front of the snowmobile engine relative to a front end of the snowmobile, wherein the air box assembly draws outside air from an air inlet positioned in front of the snowmobile engine, the air box assembly comprising an air inlet/outlet port in fluid communication with the throttle body assemblies; providing a flexible tube having a first end and a second end, the first end having an inlet aperture secured to the air inlet/outlet port, and the second end secured to the throttle body assemblies, the second end having two or more outlet apertures receiving the at least two or more inlet tubes of the throttle body assemblies; and communicating throttle noise from the throttle body assemblies of the snowmobile to the air box assembly.