Throttle-By-Wire 2008-2016 HPi Throttle-By-Wire throttle bodies are designed to increase airflow and improve horsepower gains while maintaining compatibility with stock map sensors, fuel rail and cruise control. Versions for 2008-2016 H-D® Big Twins, with B2, and B3 options also available. Offering four different throttle body sizes to cover several build options 58mm Elliptical, 68mm Big Bore with intake diameter sizes ranging from stock to1.800 and 1.900. Raised deck heights are also available for specific build modifications. Official order is placed when stock throttle body is sent in with work order form, 3-5 day turnaround time *Depending on how many arrive each week. Here's the low down on the process: Send in stock throttle body. We make sure the electronics are properly working, then surgically remove them & give the stock body a proper burial RIP