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!
1999–'01 EFI big twins (except Softail models) . . . . . . . . . . . . . . . .106-4406
- 2002–'05 EFI big twins & 2001 Softail models . . . . . . . . . . . . . . . . 106-4407
- 2006–up EFI big twins
(except 2008–up touring models with electronic throttle control). . . . . . 106-4408
SPECIAL NOTES: 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
