ACCEL SuperStock Spiral Core Spark Plug Wire Sets are a true performance upgrade for tired old OE wires on GM small-blocks with HEI ignitions. Engineered specifically for high-performance street use, these black 8mm wire sets deliver maximum spark energy to the plugs and create a longer-lasting, hotter flame kernel, quicker throttle response, and reduced emissions. High-gloss 550-degree-rated double-silicone construction eliminates arcing and resists heat, petrochemicals, and moisture, and an all-Kevlar stranded inner core and fiberglass braiding provide added pull strength and better terminal retention. These wires have just 500 ohms per foot of resistance, eliminate RFI, include stainless steel terminals for unsurpassed electrical conductivity, and come with matching black 90-degree plug boots.