Ultimate Race Spark Plug Boot Shield 1" ID bends 90⁰ - 6Pk -6mm (1/4")-thick BioCool thermal-barrier inner

-6mm (1/4")-thick BioCool thermal-barrier inner pad sandwiched between heavy-duty foil

Features: -Reflects and dissipates heat

Aim to cover 70-80% of flat

Heatshield Products® Oil Filter Lava Heat Shield suits GM LS/LT1/LT4 series

200 degrees intermittent heat

Ultimate Race Spark Plug Boot Shield 1" ID bends 90⁰ - 6Pk -6mm (1/4")-thick BioCool thermal-barrier innerSpark Plug Boot Shield Ultimate Race 6 Pack Universal 1" ID. Protect and increase the life of your expensive plug wire sets with our HPP Ultimate Race Spark Plug Boot Shields. Preventing misfires caused by burnouts, loss in performance and critical engine damage. Double wall construction provides superior protection, while special coatings reflect and dissipate heat to boots. It's universal design fits most boots, even 90. Able to withstand 1800F