S&S Cycle

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

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

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

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SKU: SSC550-0501
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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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Product Details

Product Description
Part Numbers
Sizing & Fit

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

Optimize Your Ride with S&S Cycle HI-4N Ignition Module

Elevate the performance of your 1977-1984 Harley-Davidson Shovelhead or early Evolution engine with the S&S Cycle HI-4N Ignition Module. This advanced ignition system is engineered to provide precise timing and a strong spark, crucial for maximizing horsepower and torque. The HI-4N offers multiple advance curves, allowing you to fine-tune your engine's performance for various riding conditions and modifications. Its robust design ensures reliability, making it an ideal upgrade or replacement for older, less efficient ignition units.

Key Features & Benefits:

  • Improved Engine Performance: Delivers precise timing for optimal power and efficiency.
  • Selectable Advance Curves: Customize your ignition timing to match your engine's setup and riding style.
  • Enhanced Reliability: Built with high-quality components for long-term durability.
  • Easy Installation: Designed for a straightforward fitment on specified Harley-Davidson models.
  • Broad Fitment: Compatible with a wide range of 1977-1984 Harley-Davidson Shovelhead and Evolution engines.

Invest in the S&S Cycle HI-4N Ignition Module to unlock the full potential of your classic Harley. Get yours today at GGCRACING and experience the difference in performance and reliability.

Vehicle Fitment

Years Make Model Trim
1997-1999 Harley-Davidson FLHR Road King Base
1998-1999 Harley-Davidson FLHRCI Road King Classic Base
1996-1997 Harley-Davidson FLHRI Road King Base
1980-1984 Harley-Davidson FLHS Electra Glide Sport Base
1983-1999 Harley-Davidson FLHTC Electra Glide Classic Base
1996-1999 Harley-Davidson FLHTCI Electra Glide Classic Base
1989-1997 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1986-1990 Harley-Davidson FLST Heritage Softail Base
1990-1999 Harley-Davidson FLSTF Fat Boy Base
1994-1996 Harley-Davidson FLSTN Heritage Softail Special Base
1980-1983 Harley-Davidson FLT Tour Glide Base
1998-1999 Harley-Davidson FLTR Road Glide Base
1998-1999 Harley-Davidson FLTRI Road Glide Base
1993-1999 Harley-Davidson FXDL Dyna Low Rider Base
1993-1999 Harley-Davidson FXDWG Dyna Wide Glide Base
1999 Harley-Davidson FXDX Dyna Super Glide Sport Base
1987-1994 Harley-Davidson FXLR Low Rider Custom Base
1999 Harley-Davidson FXR2 Base
1982-1992 Harley-Davidson FXRS Low Glide Base
1983-1992 Harley-Davidson FXRT Sport Glide Base
1977-1982 Harley-Davidson FXS Low Rider Base
1983-1985 Harley-Davidson FXSB Low Rider - Belt Base
1999 Harley-Davidson FXSTB Night Train Base
1988-1999 Harley-Davidson FXSTS Springer Softail Base
1995-1997 Harley-Davidson FXSTSB Bad Boy Base
1980-1986 Harley-Davidson FXWG Wide Glide Base

Product Details

Product Description
Part Numbers
Sizing & Fit

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

Optimize Your Ride with S&S Cycle HI-4N Ignition Module

Elevate the performance of your 1977-1984 Harley-Davidson Shovelhead or early Evolution engine with the S&S Cycle HI-4N Ignition Module. This advanced ignition system is engineered to provide precise timing and a strong spark, crucial for maximizing horsepower and torque. The HI-4N offers multiple advance curves, allowing you to fine-tune your engine's performance for various riding conditions and modifications. Its robust design ensures reliability, making it an ideal upgrade or replacement for older, less efficient ignition units.

Key Features & Benefits:

  • Improved Engine Performance: Delivers precise timing for optimal power and efficiency.
  • Selectable Advance Curves: Customize your ignition timing to match your engine's setup and riding style.
  • Enhanced Reliability: Built with high-quality components for long-term durability.
  • Easy Installation: Designed for a straightforward fitment on specified Harley-Davidson models.
  • Broad Fitment: Compatible with a wide range of 1977-1984 Harley-Davidson Shovelhead and Evolution engines.

Invest in the S&S Cycle HI-4N Ignition Module to unlock the full potential of your classic Harley. Get yours today at GGCRACING and experience the difference in performance and reliability.

Vehicle Fitment

Years Make Model Trim
1997-1999 Harley-Davidson FLHR Road King Base
1998-1999 Harley-Davidson FLHRCI Road King Classic Base
1996-1997 Harley-Davidson FLHRI Road King Base
1980-1984 Harley-Davidson FLHS Electra Glide Sport Base
1983-1999 Harley-Davidson FLHTC Electra Glide Classic Base
1996-1999 Harley-Davidson FLHTCI Electra Glide Classic Base
1989-1997 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1986-1990 Harley-Davidson FLST Heritage Softail Base
1990-1999 Harley-Davidson FLSTF Fat Boy Base
1994-1996 Harley-Davidson FLSTN Heritage Softail Special Base
1980-1983 Harley-Davidson FLT Tour Glide Base
1998-1999 Harley-Davidson FLTR Road Glide Base
1998-1999 Harley-Davidson FLTRI Road Glide Base
1993-1999 Harley-Davidson FXDL Dyna Low Rider Base
1993-1999 Harley-Davidson FXDWG Dyna Wide Glide Base
1999 Harley-Davidson FXDX Dyna Super Glide Sport Base
1987-1994 Harley-Davidson FXLR Low Rider Custom Base
1999 Harley-Davidson FXR2 Base
1982-1992 Harley-Davidson FXRS Low Glide Base
1983-1992 Harley-Davidson FXRT Sport Glide Base
1977-1982 Harley-Davidson FXS Low Rider Base
1983-1985 Harley-Davidson FXSB Low Rider - Belt Base
1999 Harley-Davidson FXSTB Night Train Base
1988-1999 Harley-Davidson FXSTS Springer Softail Base
1995-1997 Harley-Davidson FXSTSB Bad Boy Base
1980-1986 Harley-Davidson FXWG Wide Glide Base

Product Details

Product Description

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

Optimize Your Ride with S&S Cycle HI-4N Ignition Module

Elevate the performance of your 1977-1984 Harley-Davidson Shovelhead or early Evolution engine with the S&S Cycle HI-4N Ignition Module. This advanced ignition system is engineered to provide precise timing and a strong spark, crucial for maximizing horsepower and torque. The HI-4N offers multiple advance curves, allowing you to fine-tune your engine's performance for various riding conditions and modifications. Its robust design ensures reliability, making it an ideal upgrade or replacement for older, less efficient ignition units.

Key Features & Benefits:

  • Improved Engine Performance: Delivers precise timing for optimal power and efficiency.
  • Selectable Advance Curves: Customize your ignition timing to match your engine's setup and riding style.
  • Enhanced Reliability: Built with high-quality components for long-term durability.
  • Easy Installation: Designed for a straightforward fitment on specified Harley-Davidson models.
  • Broad Fitment: Compatible with a wide range of 1977-1984 Harley-Davidson Shovelhead and Evolution engines.

Invest in the S&S Cycle HI-4N Ignition Module to unlock the full potential of your classic Harley. Get yours today at GGCRACING and experience the difference in performance and reliability.

Vehicle Fitment

Years Make Model Trim
1997-1999 Harley-Davidson FLHR Road King Base
1998-1999 Harley-Davidson FLHRCI Road King Classic Base
1996-1997 Harley-Davidson FLHRI Road King Base
1980-1984 Harley-Davidson FLHS Electra Glide Sport Base
1983-1999 Harley-Davidson FLHTC Electra Glide Classic Base
1996-1999 Harley-Davidson FLHTCI Electra Glide Classic Base
1989-1997 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1986-1990 Harley-Davidson FLST Heritage Softail Base
1990-1999 Harley-Davidson FLSTF Fat Boy Base
1994-1996 Harley-Davidson FLSTN Heritage Softail Special Base
1980-1983 Harley-Davidson FLT Tour Glide Base
1998-1999 Harley-Davidson FLTR Road Glide Base
1998-1999 Harley-Davidson FLTRI Road Glide Base
1993-1999 Harley-Davidson FXDL Dyna Low Rider Base
1993-1999 Harley-Davidson FXDWG Dyna Wide Glide Base
1999 Harley-Davidson FXDX Dyna Super Glide Sport Base
1987-1994 Harley-Davidson FXLR Low Rider Custom Base
1999 Harley-Davidson FXR2 Base
1982-1992 Harley-Davidson FXRS Low Glide Base
1983-1992 Harley-Davidson FXRT Sport Glide Base
1977-1982 Harley-Davidson FXS Low Rider Base
1983-1985 Harley-Davidson FXSB Low Rider - Belt Base
1999 Harley-Davidson FXSTB Night Train Base
1988-1999 Harley-Davidson FXSTS Springer Softail Base
1995-1997 Harley-Davidson FXSTSB Bad Boy Base
1980-1986 Harley-Davidson FXWG Wide Glide Base

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