Fits: 1999–'01 EFI big twins (except Softail® Models. In response to constant requests for something bigger, S&S also offers a huge 58mm bore throttle body! Strictly for large displacement competition engines, this throttle body allows your engine to breathe easy and make more power!
If you plan to use another programmable fuel injection module, it is best to consult the manufacturer to be certain that it is compatible with the S&S single bore system
and has enough tuning capability for your engine configuration.
Installation of S&S throttle body on 1995-'01 bikes requires S&S ECU. Single bore throttle bodies are not compatible with stock Magneti Marelli® ECU