Sierra 18-8844-1 Spark Plug Wire Set Model: 454/502; Ignition Type: XL Series; Cyl.: 8; Features: Kevlar core for maximum durability and long life; Durable stainless steel wound conductor for maximum horsepower and engine performance; Premium silicone jacketing and boots for the ultimate in high temperature protection; Superior RFI suppression for the most sensitive electronic system; Corrosion resistant stainless steel spark plug and distributor terminals for maximum conductivity;