Titanium Protect-A-Boots(TM) XL are the latest in thermal protection technology for spark plug boot protectors. Developed from a unique material mined from lava rock stranded and woven into a proprietary weave for added durability and strength yet is pliable enough to provide a universal fit for straight or angled boots. Titanium Protect-A-Boots XL are naturally resistant to heat, chemicals, abrasions and contaminants, and are engineered to withstand temperatures up to 1800F (983C) of direct heat. High horsepower engine compartments are known for extreme heat that can put spark plug boots and wires at risk. With excessive heat generated from the exhaust manifold and headers the ignition system is vulnerable to the potential of burning hardening and cracking of ignition wires and boots that could lead to arching engine misfire and potential ignition system failure. Titanium Protect-A-Boots XL with LR technology are engineered to handle extreme heat, providing the ultimate protection for todays high voltage ignition systems for many applications including automotive marine and powersports. The color and weave work together to give DEIs Titanium Protect-A-Boots XL a cool carbon fiber appearance that looks great under the hood - ideal for race, street show cars and off road vehicles. Ultimate protection for spark plug boots and wires Withstands heat up to 1800F (983C) Universal-fits most straight or angled boots Strong, durable and long lasting construction Resistant to chemicals, abrasions Cool carbon fiber look 8in extra large boots No restricting steel ring PERFECT FOR LS MOTORS!