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SUMAX 409 Pro Race Custom-Fit Spark Plug Wire Kit
$89.95
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$89.95
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$89.95
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409 Pro Race Spark Plug Wire Kit – 10.4 mm
Upgrade your ignition setup with Sumax’s 409 Pro Race Spark Plug Wire Kit — built for riders who want cleaner spark, stronger throttle response, and long-term dependability on their Harley bagger or touring rig. These wires are precut, pre-terminated, and wrapped in high-temp silicone capable of handling brutal heat and vibration. With a Spiro-Pro core delivering 10x the conductivity of standard carbon-core wires, you get a hotter spark, smoother idle, and longer wire life. Made in the USA and built for modern electronic ignitions, these are a killer upgrade for any performance-minded rider.
Includes
• 1 pair of 10.4 mm Sumax spark plug wires
• Pre-installed plug and coil boots
• High-temp silicone construction rated up to 600°F
Fitment
Compatible with a wide range of Harley-Davidson touring, bagger, and police models including:
• 2017–2025 Street Glide, Road Glide, Road King (various trims)
• 2017–2025 Police FLHTPI / FLHP
• 2022–2024 ST models (FLHXST / FLTRXST)
• 2020–2024 Road Glide Limited
• 2023 Electra Glide Highway King
• 2024 Hydra-Glide Revival