Harley-Davidson Fat Boy Systems & Alarms

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

Select your year for exact fitment & prices

Genuine Harley-Davidson

Security System Siren

Genuine Harley-Davidson

Smart Siren Battery Replacement Kit

Genuine Harley-Davidson

Integrated Security & Locking Flip Fob

Aftermarket systems & alarms that fit the Fat Boy. Genuine Harley-Davidson is listed above, not here.

S&S Cycle

S&S SINGLE BORE TUNED INDUCTION SYSTEM

S&S Cycle

S&S SINGLE BORE TUNED INDUCTION SYSTEM

S&S Cycle

S&S SINGLE BORE TUNED INDUCTION SYSTEM

MCJ

MCJ ADJUSTABLE 2-INTO-2 ROYAL 100 SYSTEM FOR FAT BOY 2025 TO PRESENT

MCJ

MCJ ADJUSTABLE 2-INTO-2 ROYAL 100 SYSTEM FOR FAT BOY 2025 TO PRESENT

HyperPro

HYPERPRO "LINK SYSTEM" FRONT SUSPENSION SPRINGS

HyperPro

HYPERPRO "LINK SYSTEM" REAR SUSPENSION SPRINGS