Single Fire Programmable Ignition Coil Kit - Compatible with 1970-1999 Harley-Davidson Big Twin (Except Twin Cam) & 1986-2003 Sportster (Except S models), Replaces 53-660

Additional Details from the Manufacturer

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More features

• Wide Compatibility: Compatible with Harley-Davidson Big Twin models 1970–1999 (except Twin Cam) and Sportster 1986–2003 (except ‘S’ models).Also Fit most Evolution and Shovelhead engines (carbureted models only, not for fuel-injected bikes).
• High-Output Single-Fire Coil: High-output single fire coil designed to deliver a strong, consistent spark for reliable ignition performance when properly installed and tuned.
• Programmable Ignition Functions: Includes multiple adjustable ignition curves for part-throttle and wide-open-throttle use,rear-cylinder timing adjustments available when used with the programming kit.
• Built-In Safeguards: Intelligent circuitry protects against short-circuits, over-voltage, and over-current conditions to prevent electrical damage. A durable solid-state design ensures long-term reliability – just use proper wiring (correct coil polarity and no solid-core plug wires) for safe operation. Professional installation is strongly recommended.
• Data & Usage Information: Supports recording of engine hours, maximum RPM, time at wide-open throttle and number of starts when used with the programming kit, helping you monitor engine use and plan maintenance.