Proflow Spark Plug Boot Heat Shields, Lava Rock, 640°C, Natural, 1 in. i.d., 6 in Length, Set of 8

Proflow's spark plug boot protectors are made from a high temperature resistant lava-rock braided fibre and are resistant up to 600°C. It's double wall construction adds durability and helps to prevent misfire caused by plug-wire burnout, which can cause critical engine damage and performance loss.