Moroso 73695 Ultra 40 Race Spark Plug Wire Set 8.65mm Red HEI Unsleeved Under Header

The Moroso 73695 Ultra 40 Race Spark Plug Wire Set is a high-performance, unsleeved ignition wire set designed for under-header routing with an HEI-style distributor cap connection. Built to race-proven standards, this 8.65mm wire set delivers exceptional spark energy transfer while providing industry-leading EMI and RFI suppression.

Key Features:

• 8.65mm diameter wire with a class-leading 40 ohms of resistance per foot for optimized spark energy delivery
• Spiral-wound nickel/copper alloy conductor wrapped at the optimum ratio to maximize spark energy while minimizing electromagnetic and radio frequency interference
• Kevlar® core — four times stronger than standard aramid fiber cores — increases tensile strength while reducing center diameter and improving surrounding insulation for greater dielectric strength
• Extra-thick EPDM layer provides superior dielectric strength and protection against outside electrical interference
• Closely woven, silicone-impregnated fiberglass insulation adds up to 8,000 extra volts of protection against heat, chafing, and contaminants
• High-temperature silicone boots rated to withstand up to 600°F of heat
• Locking stainless steel plug terminals ensure a secure, corrosion-resistant connection
• HEI-style distributor cap termination for compatibility with GM HEI-style ignition systems
• Under-header routing configuration for engines with headers
• Unsleeved design in red wire color
• Made in the USA at Moroso Wire Technologies

The Moroso Ultra 40 is the standard in high-performance ignition wiring, used across the full spectrum of racing applications from grassroots drag racing to NASCAR Cup Series and Top Fuel competition. Each wire is pre-cut to the correct length and factory-terminated for a precise, reliable fit.