Close-up of an S&S Cycle HI-4N Performance Ignition Module for 1970-1999 Harley-Davidson Big Twin and 1986-2003 Sportster, showing labeled mode, advance rate, and RPM limit dials with a black cable attached.

S&S HI-4N Performance Ignition Module for 1970-1999 Harley-Davidson Big Twin and 1986-2003 Sportster

SKU: 108-0187

$411.95 $370.75 Save $41.20
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S&S HI-4N Performance Ignition Module for 1984-1999 Harley-Davidson Shovelhead, Evolution, and 1986-2003 Sportster

Electronic ignition modules don't last forever, especially ones that live in the hot nose cone on Evos and Shovels. If you need a replacement, the S&S HI-4N offers adjustability OEM-pattern replacements can't match.

  • Single-fire and dual-fire function built into a single module
  • All-metal housing provides improved heat dissipation
  • Ignition advance and timing degree markings are on the metal flange
  • Sensor housings contain advanced flux concentrators with high-temperature-resistant samarium/cobalt magnets for accurate, reliable ignition triggering
  • Electronics are fully enclosed to resist vibration, moisture and dirt
  • Four rotary switches for ignition mode selection, advance rate, and rev limit
  • Not for fuel-injected models

Note:  Not legal for sale or use in California on any pollution controlled motor vehicles.

  • 1970-1999 Harley-Davidson Big Twin with Shovelhead or Evolution engine
  • 1986-2003 Harley-Davidson Sportster
  • 108-0187; replaces 2101-0345, 550-0501

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California: ⚠️WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Install Instructions

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