• spark plugs

Insultherm Spark Plug Boot Insulators are the ideal solution for protecting spark plugs, boots and cable ends from extreme engine heat. SPBI's are woven from durable, heat resistant fiberglass yarn. The woven fabric is formed into a double layered sleeve that easily fits over most standard plug/boot combinations, even right angle configurations. The assembly will resist to temperature bursts up to 1,200° F and will continuously protect your delicate components up to 500° F. They can even rest right on the headers, or any hot surface, without any effect!

Insultherm Spark Plug Boot Insulators are available in 4, 6 or 8 piece boxes and in 7.5" lengths to accommodate virtually any application. Choose between Tan, Red, Blue, and Black.