S&S Cycle HI-4N Ignition Kit for 1970-1999 Harley-Davidson Big Twin

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