Titanium Spark Plug Boot Protector Sleeve Spark Plug Wire Boots 8cyl Titanium Spark Plug Wire Boots,6" long (Set of 8) Titanium Spark Plug Boot is made from titanium lava rock, heat rated up to 900F continuous , and 1800F of radiant heat This universal spark plug boot protector can fit most angled and straight boots. Can be used from ultimate race cars, street vehicles, to motor homes. Looks great ,helps reduce misfires,Resists damaging chemicals, extends life of wire & boots.