S&S Cycle
S&S Cycle Single Fire HI-4N Ignition Kit — Fits 1977-1984 Harley-Davidson Shovelhead & Evolution Models
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S&S Cycle Single Fire HI-4N Ignition Kit — Fits 1977-1984 Harley-Davidson Shovelhead & Evolution Models
S&S Cycle

S&S Cycle Single Fire HI-4N Ignition Kit — Fits 1977-1984 Harley-Davidson Shovelhead & Evolution Models

SKU: SSC550-0502

About S&S Cycle S&S Cycle engineers high-quality automotive parts and ...Read more

Price:
$599.95
5990 ENTRIES10X
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

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About S&S Cycle

S&S Cycle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full S&S Cycle lineup with fast shipping and expert fitment support — order with confidence.

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Maximize Spark & Performance with S&S Cycle Single Fire HI-4N Ignition Kit

Transform your 1977-1984 Harley-Davidson Shovelhead or early Evolution engine with the comprehensive S&S Cycle Single Fire HI-4N Ignition Kit. This kit provides a complete single fire ignition solution, delivering a dedicated spark to each cylinder for superior combustion efficiency and power output. Unlike dual fire systems, single fire ignitions eliminate spark waste, resulting in smoother engine operation, improved throttle response, and more consistent performance across the RPM range. The HI-4N module is renowned for its reliability and customizable advance curves, allowing riders to dial in their engine for optimal results.

Kit Includes:

  • S&S Cycle HI-4N Ignition Module
  • High-quality Single Fire Ignition Coil
  • Necessary Wiring and Hardware for Installation

Benefits of Single Fire Ignition:

  • Independent Cylinder Spark: Ensures each cylinder fires precisely when needed, reducing misfires.
  • Increased Horsepower & Torque: Optimizes combustion for greater engine output.
  • Smoother Engine Operation: Reduces vibration and improves overall ride quality.
  • Customizable Performance: Adjust advance curves to suit your engine's build and riding style.

Experience the ultimate in ignition control and performance for your classic Harley. Shop the S&S Cycle Single Fire HI-4N Ignition Kit at GGCRACING for unparalleled quality and reliability.

About S&S Cycle

S&S Cycle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full S&S Cycle lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Maximize Spark & Performance with S&S Cycle Single Fire HI-4N Ignition Kit

Transform your 1977-1984 Harley-Davidson Shovelhead or early Evolution engine with the comprehensive S&S Cycle Single Fire HI-4N Ignition Kit. This kit provides a complete single fire ignition solution, delivering a dedicated spark to each cylinder for superior combustion efficiency and power output. Unlike dual fire systems, single fire ignitions eliminate spark waste, resulting in smoother engine operation, improved throttle response, and more consistent performance across the RPM range. The HI-4N module is renowned for its reliability and customizable advance curves, allowing riders to dial in their engine for optimal results.

Kit Includes:

  • S&S Cycle HI-4N Ignition Module
  • High-quality Single Fire Ignition Coil
  • Necessary Wiring and Hardware for Installation

Benefits of Single Fire Ignition:

  • Independent Cylinder Spark: Ensures each cylinder fires precisely when needed, reducing misfires.
  • Increased Horsepower & Torque: Optimizes combustion for greater engine output.
  • Smoother Engine Operation: Reduces vibration and improves overall ride quality.
  • Customizable Performance: Adjust advance curves to suit your engine's build and riding style.

Experience the ultimate in ignition control and performance for your classic Harley. Shop the S&S Cycle Single Fire HI-4N Ignition Kit at GGCRACING for unparalleled quality and reliability.

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