2008-Present Harley-Davidson® EFI Throttle-by-wire motorcycles. CNC machined in-house from high quality 356 aluminum castings to ensure perfect OEM fit every time. Thees Harley Performance Parts utilize your stock electronics and build them into our proven Max Flow™ 55mm throttle body to 58mm manifold or Elliptical 58mm throttle body to 58mm manifold, CNC ported and hand finished. Complete with double sealed bearings, o-ringed gaskets and billet intake flanges and seals make this upgrade the best on the market in just 3-5 business days turnaround time. Designed to increase airflow and improve horsepower gains between 10-15hp depending on other build modifications. All orders are placed when stock throttle body is sent in with throttle-by-wire work form. B2 and Hurricane Head® applications available.