MSD 5567 Street-Fire 8mm Spark Plug Wire Set Big Block Chevy 454 HEI

The MSD 5567 Street-Fire Spark Plug Wire Set is a pre-terminated, direct-fit 8-wire set engineered for Big Block Chevy 454 engines equipped with factory HEI ignition systems (1975 and later). Delivering reliable ignition performance at an accessible price point, this set is a popular upgrade or replacement for aging stock wires on classic Chevy and GMC trucks and SUVs.

Each wire features a spiral core (helically wound) conductor rated at 500 ohms per foot of resistance, striking the right balance between spark energy delivery and electromagnetic interference suppression. The conductor is wrapped in a durable 8mm silicone and synthetic jacket that resists heat and abrasion, while silicone boots at both ends protect the terminals from high exhaust temperatures.

Key Features:

• 8mm diameter silicone/synthetic outer jacket — resists heat and abrasion
• Spiral core (helically wound) conductor — suppresses EMI/RFI interference
• Kevlar/Aramid core — provides exceptional tensile strength and durability
• 500 ohms/ft resistance — optimized for improved spark delivery and power
• Heavy-duty HEI male post distributor terminals with 90° black silicone boots
• Eight straight 180° silicone spark plug boots — black finish
• RFI suppression included
• Sold as a complete 8-wire set (coil wire not included)
• Legal for sale and use in all 50 states — does not affect vehicle emissions

The MSD 5567 is sold as a ready-to-install kit with factory-style boots and terminals pre-installed. No crimping tools required. This wire set is a cost-effective ignition upgrade for street-driven Big Block Chevy builds, restorations, and daily drivers.