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Once installed, the sleeves require no clearance from hot surfaces, and can even rest directly on hot exhaust headers without affecting performance. Just slip these 3/4” diameter double thickness (triple thick at the sewn end) sleeves over any spark plug cable and boot (even right angle boots) to protect them from engine temperatures up to 1,200☏. Boot Sleeve protectors fit 90, 135 and 180. These innovative sleeves offers high temperature protection in an easy slip on sleeve that will extend the life of expensive spark plug wires by protecting them where they need it most. Shop the Worlds Largest Aftermarket Motorcycle Parts and Accessories Superstore utmmediumdescription&utmcampa. The sleeves have double wall thickness for excellent protection yet they are flexible and easy to install. Double Thick Heat Resistant Braided Fiberglass Bootsįor decades, Techflex®’s Insultherm® braided fiberglass sleeving has been the first choice among automotive professionals and enthusiasts alike for many of their thermal protection applications. Meet the required noise suppression standards of your powersports application with NGK spark plug resistor covers Using these covers reduces the electromagnetic and radio frequency interferences that can disrupt the proper operation of your ignition components, leading to misfires and poor engine operation.