Harley-Davidson Spark Plug Wire Kit — Red Silicone, Pre-Crimped (2-Pack)
Restore reliable ignition performance on your Harley-Davidson Big Twin with this pre-crimped spark plug wire set. Engineered with a full silicone jacket, insulation, and core for superior heat resistance, these wires are a direct-fit replacement for Dyna FXD (2000–2017) and Softail (1999–2017) models. Suitable for street, custom, and race builds.
Key Features
Full Silicone Construction — jacket, insulation, and core rated for high-temperature engine environments
Pre-Crimped Ends — 10.4mm and 10mm rubber ends included; 90-degree and straight boots for flexible routing
Direct-Fit Replacement — designed for factory coil location on cylinder (seat post mount)
Ideal for bobbers, scramblers, café racers, relocation kits, and custom builds
Non-OEM aftermarket accessory
Specifications
Spec
Detail
Part Number
DYNA-409RD
Wire Diameter
10.4mm & 10mm
Color
Red
Material
Silicone (jacket, insulation & core)
Short Wire Length
24cm / 9.45"
Long Wire Length
53cm / 20.87"
Boot Style
90-degree & straight
Package
2x pre-crimped spark plug wires
Fitment Guide
Harley-Davidson Dyna FXD: 2000–2017
Harley-Davidson Softail: 1999–2017
Fits Big Twin models with coil mounted on seat post (factory location)
Please confirm make, model, year, and spark plug size before ordering
Use Cases
Perfect for replacing worn or damaged OEM spark plug wires, upgrading to silicone for heat resistance, or refreshing the look of your Harley with red wires on a custom bobber, scrambler, or café racer build.
