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

Genuine Harley-Davidson

M18 to M12 O2 Sensor Thread Adapters

65700025
Iron Pass £38.59£45.40View

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
Iron Pass £163.22£192.02View
WEGO III WIDE-BAND AIR-FUEL RATIO TUNING AID

Daytona Twin Tec

WEGO III WIDE-BAND AIR-FUEL RATIO TUNING AID

In stock
Iron Pass £520.97£612.90View
DIAG-4-BIKE SERIAL DIAGNOSTIC & FLASH TUNING

Diag4Bike

DIAG-4-BIKE SERIAL DIAGNOSTIC & FLASH TUNING

In stock
Iron Pass £822.15£967.24View