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Extreme Heat Protection for Spark Plug Wires: Our 8-piece spark plug wire heat shield sleeves withstand continuous high temperatures of 500°C (932°F), with a peak of up to 1650°C (3002°F), blocking 80% of radiant heat. They shield wires and boots from exhaust header heat to prevent heat soak, cracking and electrical failures — keeping stable ignition performance in high-temperature environments. Durable Double-Layer Material: Crafted with double-layer braided fiberglass (alkali-free), these sleeves offer long-lasting durability and corrosion resistance. The robust build effectively extends the service life of your spark plug wires, saving you from frequent replacements of expensive ignition components. Universal Fit & Tool-Free Installation: Each 6-inch sleeve fits 90°, 45° and straight spark plug boots. Installation is quick — simply slide the sewn end over the boot, then thread the sleeve over the wire by hand. No tools required. Comprehensive Vehicle Compatibility: Designed for most standard spark plug wire sizes, this heat shield set is ideal for classic V8s, performance builds, towing setups and modified vehicles. Fits LS1/LS2, SBC (Small Block Chevy), BBC (Big Block Chevy), 350 and 454 engines — covering a wide range of cars, trucks and muscle vehicles. Safety & Complete Package: The package includes 8 heat shield sleeves and 10 metal zip ties. For safe handling, wear gloves and long sleeves during installation to avoid skin irritation from the fiberglass material.