Iron Stable

Harley-Davidson Fat Boy S Tuning

Genuine HD tuning and aftermarket alternatives that fit the Fat Boy S — all years. Select your year for exact fitment and pricing.

Select your year for exact fitment & prices

20172016

Genuine Harley-Davidson (2)

Oxygen Sensor Harness Extension

Genuine Harley-Davidson

Oxygen Sensor Harness Extension

69201704
£35.06Iron Pass £29.80£31.55View
M18 to M12 O2 Sensor Thread Adapters

Genuine Harley-Davidson

M18 to M12 O2 Sensor Thread Adapters

65700025
£45.40Iron Pass £38.59£40.86View

Aftermarket for your Fat Boy S

Confirmed to fit your Fat Boy S

Aftermarket tuning the supplier lists against the Fat Boy S. Genuine Harley-Davidson is listed above, not here.

TUNING LICENSE FOR DIAG-4-BIKE

Diag4Bike

TUNING LICENSE FOR DIAG-4-BIKE

In stock
£189.74Iron Pass £180.25£185.95View
WEGO III WIDE-BAND AIR-FUEL RATIO TUNING AID

Daytona Twin Tec

WEGO III WIDE-BAND AIR-FUEL RATIO TUNING AID

In stock
£605.92Iron Pass £533.21£551.39View
DIAG-4-BIKE SERIAL DIAGNOSTIC & FLASH TUNING

Diag4Bike

DIAG-4-BIKE SERIAL DIAGNOSTIC & FLASH TUNING

In stock
£955.75Iron Pass £907.96£936.64View