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HPi Sportster® throttle body kits fit all fuel injected Harley-Davidson® Sportster® motorcycles.  This unit allows for more airflow over the stock 45mm throttle body.  Kit includes a Billet-Pro air cleaner equipped with a custom air filter element (carbon fiber cover sold separately).  Designed to improve horsepower gains between 8-10hp depending on other build modifications.  51mm and 55mm throttle body sizes available with CNC ported intake runner diameters for 1.620 and 1.710 dimensions.


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        Part #                     Diameter               Intake Runner     Price $

  • HPI-51S1-62          51mm                    1.620                    $840

  • HPI-51S1-17          51mm                    1.710                    $840

  • HPI-55S1-62          55mm                    1.620                    $840

  • HPI-55S1-17          55mm                    1.710                    $840

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