CABLE DRIVEN UNITS

HPi Cable Driven units are offered in sizes 51mm, 55mm, 58mm, 62mm and 64mm for all 2001-2005 and 2006-2017 Big Twin/Twin Cam models.  We offer straight bore 51, 55 and 58mm and also a Max Flow series (55mm bore that opens to a 58mm at the manifold) and 58-62mm and a straight 62mm that includes our V2 air cleaner to fit the large bore throttle body.  Our largest cable driven throttle body, the 64mm is a billet machined throttle body that includes a high flow fuel rail and converts the bolt pattern over to throttle-by-wire. 

THROTTLE-BY-WIRE UNITS

HPi Throttle-By-Wire throttle bodies available for 2008-2016 H-D® Big Twins are designed to increase airflow and improve horsepower gains while maintaining compatibility with stock map sensors, fuel rail and cruise control.  Offering 55-58, 58, 62-64 and 68mm sizes to cover any popular build, all CNC machined in-house from high quality 356 aluminum casting and a CNC ported intake manifold.  All orders are placed when stock throttle body is sent in with throttle-by-wire work form.  B2, B3 and Hurricane Head® applications available.

Download Work Order Form Here

MILWAUKEE 8® UNITS

HPi Milwaukee 8® throttle bodies are available in 58mm, 62mm and 70mm sizes.  The HPi design allows for more airflow over stock (55mm) throttle body through their billet manufactured throttle body and CNC ported intake design.  Other features include stock location for air cleaner bolt pattern, cruise control compatible and made in USA.


Download Work Order Form Here 

SPORTSTER® UNITS

HPi Sportster® throttle bodies fit all fuel injected 2007+Sportster® Harley-Davidson® motorcycles.  These units allow for more airflow over the stock 45mm throttle body.  Kit includes a Billet-Pro air cleaner equipped with a K&N® lifetime warranty 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.

MAGNETTI MARELLI® UNITS

HPi Marelli® throttle bodies fit 1995-2001 Marelli® injected Harley-Davidson® motorcycles.  Electronic Fuel Injection (EFI) problems have been solved with this single bore throttle body and intake manifold.  Hard starting and erratic idling issues resolved, and tuning becomes a breeze.  Performance gains are superior to any other conversion system.