Triumph America and Speedmaster High Flow Air Box Lid

Murray’s Triumph America and Speedmaster High Flow Air Box Lid gives your 790 or 865 a massive increase in air flow.  How massive?  About a 50% increase.  This Triumph air box lid is a simple bolt on solution, but will require a jetting change when using OEM Carbs.  If you want maximum performance we suggest getting Murray’s Triumph America and Speedmaster 865 or 790 Carburetor Kit.