Compufire Stator - 40 AMP Compu-Fire 3 Phase System Twin CAM — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Road King (1999-2017)

Compufire 40-amp stator for Harley Twin Cam engines, designed with a narrow profile to fit inside the stock primary cover. The vented rotor dissipates heat to maintain maximum output, and the high-output voltage regulator delivers 14.25V at idle for reliable charging on stock and modified engines.

Features

• 40-amp output capacity
• Narrow rotor and stator profile fits OEM primary cover
• Vented rotor design reduces heat buildup
• High-output voltage regulator delivers 14.25V at idle
• Made in the USA
• Not compatible with EFI applications

Specifications

• Brand: Compufire
• Manufacturer Part #: 55405
• UPC: 694342547998
• Output: 40 amps
• Voltage Regulator: 14.25V at idle
• Length: 5 in
• Width: 2 in
• Height: 8 in
• Weight: 3 lbs

Fitment

Fits Harley-Davidson Softail, Dyna, and FLT models with Twin Cam engines and OEM primary covers. Narrow profile rotor requires stock or compatible primary housing.

Frequently Asked Questions

Will this fit my Twin Cam engine in the stock primary?

Yes — the narrow rotor and stator profile are designed to fit inside the OEM primary cover without modification.

Can I use this on an EFI Harley?

No — this stator is not compatible with fuel-injected (EFI) applications. Carbureted Twin Cam engines only.

What output voltage does this regulator provide?

The high-output regulator delivers 14.25V at idle, which is higher than stock to keep batteries fully charged on modified engines.

Will this stator run hotter than the OEM unit?

No — the vented rotor design actively dissipates heat to keep operating temperatures lower than stock for sustained maximum output.

Does this fit Softail, Dyna, and FLT models?

Yes, it fits all three platform types with Twin Cam engines and OEM primary covers.