Harley-Davidson Fat Boy Tuning
Genuine HD tuning and aftermarket alternatives that fit the Fat Boy — all years. Select your year for exact fitment and pricing.
Genuine Harley-Davidson (2)
Aftermarket for your Fat Boy
Confirmed to fit your Fat Boy
Aftermarket tuning the supplier lists against the Fat Boy. Genuine Harley-Davidson is listed above, not here.
Diag4Bike
TUNING LICENSE FOR DIAG-4-BIKE
Daytona Twin Tec
WEGO III WIDE-BAND AIR-FUEL RATIO TUNING AID
Diag4Bike
DIAG-4-BIKE SERIAL DIAGNOSTIC & FLASH TUNING
Feuling
618 F Series Chain Drive Camshaft<br><ul><li>Race series</li><li>RPM range 3100-6650</li><li>Made in the USA</li><li>Aggressive camshaft requiring high lift and higher load valve springs, performance pushrods and lifters.</li><li>Requires large bore size, ported cylinder heads, ported intake manifold, high flow valves and large throttle body.</li><li>High flow air cleaner and triple stepped exhaust pipe highly recommended.</li><li>Feuling recommends matching this cam with Race Series oiling system.</li><li>Clearances must be checked when installing.</li><li>Feuling does not recommend tuning beyond stock emissions standards.</li></ul><br>Not for M8 VVT models. Overlap: 39 Lobe Separation: 107