ACCEL Super Stock Spiral Core Spark Plug Leads 350 HEI Style Black # ACC-5048KChevrolet SBC HEI STYLE . BLACK# 5048R High performance spark plug wires without the radio noise. SuperStock Spiral Core 5000 Series wire sets, which feature color matched wire and spark plug boots in blue, black, and red. With only 500 ohms ft. of resistance, more ignition energy can reach the spark plug, producing a longer lasting, hotter spark flame kernel. The results are higher performance through improved efficiency, quicker throttle response,