Blue Streak Triple Silicone XXX 8mm Spark Plug Wires Set MC-SPW6 Blue Streak ready-to-install, custom-fit 8mm Triple Silicone wire sets can be used with stock coils or when upgrading to a performance coil. These spark plug wire sets meet or exceed all of the factory'srequirements. Plus, our special "XXX" triple silicone wire featuresquality construction of silicone throughout the jacket, insulation, andcore, which assures high temperature resistance and high durability. Wire sets also offer maximum RFI suppression and feature high dielectric strength silicone boots, OEM-style terminals that lock onto the spark plug, and much more. Rated at SAE CLASS E J2031 with a continuous operating temperature of 450&degF Made in USA