SUMAX 409 Pro Race Spark Plug Wire — 10.4 mm diameter, 19 in, 37 in, Black – 99-08 Touring, 00-08 CVO, 04-06 Sportster

Designer plug wire sets provide distinctive, highly visible colors for easier routing and a performance look. 🔥

Precut harnesses arrive with plug and coil boots plus terminals already installed to speed installation and ensure consistent connections.

Boots and wires are made from extra-high-temperature silicone for protection up to 600°F, resisting heat, cracking, and deterioration.

The Spiro-Pro core delivers up to 10× the conductivity of standard carbon-core wire, giving better spark transfer and engine response.

Low resistance means these wires run cooler and last three to four times longer than carbon-core alternatives.

Designed for electronic ignitions but also compatible with point-type systems for versatile use.

Made in the USA. 🇺🇸