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S&S Cycle Single Fire HI-4N Ignition Kit
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S&S Cycle
S&S Cycle

S&S Cycle Single Fire HI-4N Ignition Kit

$599.95

On Backorder — Expected to ship by May 7, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

S&S Cycle Single Fire HI-4N Ignition Kit. Improves ignition timing for a range of Harley-Davidson models.

Key Features

  • Fits 31+ Harley-Davidson vehicle make/model combinations from 1977-1999.
  • Single fire ignition module for improved spark timing.
  • Direct replacement for stock ignition module.
  • Designed for enhanced engine performance and throttle response.
  • From S&S Cycle, a well-known manufacturer of performance engine parts.
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Product Details

What you get with this S&S Cycle Single Fire HI-4N Ignition Kit is the ignition module itself, designed to replace your stock unit and offer improved ignition timing control. This kit is built for a wide range of Harley-Davidson motorcycles, including popular models like the Electra Glide Classic, Heritage Softail, and Dyna Super Glide, spanning many years from the late 70s through the 90s. It's a significant upgrade for anyone looking to fine-tune their engine's performance.

The HI-4N ignition module uses advanced circuitry to manage spark timing more precisely than older systems. This can lead to a smoother running engine, better throttle response, and potentially improved fuel efficiency. S&S Cycle is well-known for its performance engine components, and this ignition kit is a solid option for riders who want to get the most out of their V-twin. The installation is designed to be a direct replacement for the factory ignition module, meaning it fits right into the existing mounting points and uses the stock wiring harness connectors, simplifying the process for a home mechanic.

When you're looking to optimize your Harley's ignition system, this kit from S&S Cycle is a strong contender. It's a well-built component that offers a noticeable improvement over stock ignition performance. Remember that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for specific details regarding your model year.

Specifications

Brand
S&S Cycle
Manufacturer Part #
550-0502
UPC
550-0502

Frequently Asked Questions

S&S Cycle Single Fire HI-4N Ignition Kit

$599.95