Durable insulation sleeve for spark plug boots. Made from thick woven fiberglass, these sleeves are flameretardant and wearresistant to provide longlasting protection in tough environments. They deliver electrical insulation, helping prevent leakage and interference between electrical components. Key features Size and fit: 6 inches long, designed to fit most straight or angled spark plug boots on cars, trucks, SUVs, and race cars. heat tolerance: Industrialgrade fiberglass withstands up to 1200°C, shielding spark plug wires from heat from headers, manifolds, and turbo systems. Easy installation: Slides over spark plug boots without tools for a quick, hassle upgrade to the ignition system. Benefits: Reduces heatinduced damage, minimizes electrical leakage and EMI, and extends wire life. Where to use Performance street cars with hot exhaust headers or turbochargers Race cars or track weapons exposed to underhood temperatures Trucks or SUVs operating in hot environments or with heavyduty engine heat Why it matters Keeps spark plug wires cooler and better insulated Improves reliability in heat conditions Simple, tool upgrade that fits a wide range of vehicles Overall, this sleeve provides robust heat protection, reliable insulation, and straightforward installation for enhanced ignition system durability.