S&S 106 in. Big Bore Black Kit for Harley Davidson 2006-13 FXD, 2007-13 Big Twin models
NOTE:This kit yields excellent results with stock cylinder heads, but adding a performance cam is recommended to get best performance and easier engine starts. For most applications, the S7S single bore EFI throttle body with a teardrop air cleaner or tuned induction is recommended. 08-11 Touring models will need to use stock intake or Screamin' Eagle 58mm throttle body and Race Tuner or Pro EFI Super Tuner.