Pro Spark Plug Wires – 10.4 mm

Upgrade your Softail or Low Rider ignition system with the Sumax Pro Series 10.4 mm Spark Plug Wires — built for riders who want cleaner spark, cooler temps, and long-term dependability. These wires use a Spiro-Pro performance core for up to 10x the conductivity of carbon-core wires and are wrapped in high-temp silicone rated to 600°F. Precut, pre-terminated, and proudly made in the USA, this kit delivers a strong, stable spark for both everyday riding and high-output builds.

Includes
• 1 complete spark plug wire kit
• Preinstalled plug boots and coil boots
• Precrimped, ready-to-install terminals

Fitment
• 2022–2023 FXLRS Low Rider S 117
• 2022–2023 FXLRST Low Rider ST 117
• 2022 Softail Street Bob FXBB
• 2022 FXRST Low Rider El Diablo 117
• 2021–2023 FXBBS Street Bob 114
• 2020–2023 FXST Softail Standard 107
• 2020–2021 FXLRS Low Rider S 114
• 2019–2020 FXDRS FXDR 114
• 2018–2023 FLFBS Fat Boy 114
• 2018–2023 FLHCS Heritage Classic 114
• 2018–2021, 2023 FXFBS Fat Bob 114
• 2018–2021 FLSL Softail Slim 107
• 2018–2021 FLHC Heritage Classic 107
• 2018–2021 FLSB Sport Glide 107
• 2018–2020 FXBB Street Bob 107
• 2018–2020 FLDE Deluxe 107
• 2018–2020 FXLR Low Rider 107
• 2018–2019 FXFB Fat Bob 107
• 2018–2019 FLFB Fat Boy 107