S&S Cycle HI-4N Ignition Kit for 1970-1999 Harley-Davidson Big Twin
The S&S Cycle HI-4N Ignition Kit gives your Big Twin a complete modern ignition upgrade in one package. Sensor and magnet housings are integrated directly into the all-metal back plate, making installation straightforward and protecting sensors from damage. The result is more power, accurate timing, and reliable performance your stock ignition cannot match.
Key Features
- Complete kit with all components for a full ignition system replacement
- Sensor and magnet housings built into the all-metal back plate for protection during installation
- Single-fire and dual-fire function in a single module for flexible engine configuration
- Cable notch in the housing prevents damage to wiring during and after installation
- All-metal housing with fully enclosed electronics resists vibration, moisture, and dirt
- Updated version of the popular Crane HI-4 ignition for improved performance
- Made in the USA
Technical Specifications
- Application: 1970-1999 Harley-Davidson Big Twin, 1971-1985 Sportster XL
- Function: Complete electronic ignition system kit
- Housing: All-metal with integrated sensor and magnet housings
- Controls: 4 rotary switches – mode, advance rate, rev limit
- Origin: Made in USA
Fitment Notes
- Fits 1970-1999 Harley-Davidson Big Twin engines (Shovelhead and Evolution) and 1971-1985 Sportster XL
- Not designed for fuel-injected models – carburetor applications only
- Does not fit 1999-Up Twin Cam Big Twin engines
- Replaces the popular Crane HI-4 ignition system with an updated, improved design
- Review the Fitment tab for complete year and model compatibility
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