MSD 5554 Street-Fire 8mm Spark Plug Wire Set Small Block Chevy HEI

The MSD 5554 Street-Fire Spark Plug Wire Set is a complete, pre-terminated 8-wire set engineered specifically for Small Block Chevy engines equipped with a factory HEI distributor. Wires are routed over the valve covers and feature male/HEI terminal ends for a direct, no-cut, no-crimp installation — simply snap them on and go.

Built on a spiral-wound Kevlar core conductor, these wires deliver 500 ohms per foot of resistance for stronger, more consistent spark energy while simultaneously suppressing EMI and RFI interference that can disrupt ignition performance and cause radio noise. The 8mm silicone and synthetic outer jacket resists engine heat and abrasion, while the black silicone boots at each end protect the terminals from high exhaust temperatures for long-term reliability.

Key Features:

• 8mm diameter black silicone and synthetic jacket resists heat and abrasion
• 500 ohms/ft. resistance for improved spark delivery and power
• Helically wound spiral-core conductor suppresses EMI and RFI noise
• Kevlar core combination for exceptional strength and durability
• Black silicone boots protect terminals against high exhaust temperatures
• Male/HEI distributor terminal ends — no cutting or crimping required
• Eight 90-degree spark plug boots for over-valve-cover routing
• Heavy-duty terminals for a secure, reliable connection
• RFI suppression included
• Holley/MSD Emission Code 5: Legal for sale and use on emissions-controlled vehicles