FAST 255-2426 FireWire 8.5mm Spark Plug Wire Set Ford 351 Windsor HEI 45-Degree

The FAST 255-2426 FireWire Spark Plug Wire Set is engineered specifically for the Ford 351 Windsor, delivering maximum ignition performance for street and racing applications. This 8-wire set features an 8.5mm wire diameter, HEI-style distributor terminals, and 45-degree spark plug boots — pre-terminated on both ends for a direct, custom-fit installation.

At the heart of the FireWire design is a KEVLAR-reinforced reactive core that delivers ultra-low resistance of just 25 ohms per foot — the lowest available — ensuring the maximum amount of spark energy reaches the plug gap on every firing. This reactive core also provides exceptional suppression of RFI and EMI electrical noise, protecting sensitive on-board electronics including EFI systems, engine control computers, and audio systems from ignition interference.

Key Features:

• 8.5mm wire diameter with ultra-low 25 ohms/ft resistance for maximum spark energy delivery
• KEVLAR-reinforced reactive core filters RFI and EMI noise for clean operation of EFI and onboard electronics
• Double-layer pure silicone jacket — silicone-on-silicone construction resists header heat, oils, and abrasion
• Silicone spark plug boots rated to 550°F for long-lasting durability in high-heat underhood environments
• HEI-style distributor terminal for broad compatibility with performance distributors
• 45-degree spark plug boot angle for optimized routing on Ford 351W applications
• Kit includes 8 pre-terminated wires for a direct plug-in installation

The FireWire's silicone-on-silicone sleeve construction provides unsurpassed resistance to damaging underhood fluids and high-voltage breakdown, making it equally well-suited for high-output street builds and dedicated race engines. Whether paired with a standard HEI distributor or a high-output performance ignition system, the FAST 255-2426 FireWire set ensures every joule of ignition energy reaches the combustion chamber.