Heat Shield For 135 Deg Plug Boot- 1 Pair

The heat shield for 135 degree plug boot is a critical thermal protection component designed for high-performance and modified engines where spark plug boot temperatures can exceed safe operating ranges. Built by TAYLOR/VERTEX—a trusted name in ignition system upgrades—this one-pair set addresses a common challenge in forced induction builds, high-compression applications, and tight engine bay installations where proximity to exhaust manifolds or turbochargers generates extreme radiant heat. Spark plug boots rated for 135 degrees are already at the upper limit of standard silicone tolerances; without supplemental shielding, insulation degradation occurs rapidly, leading to boot cracking, carbon tracking, and misfires.

Each shield in this pair is constructed from braided fiberglass, a material selected for its reflective properties and thermal resistance well beyond standard rubber or silicone. At 6 inches in length, the boot protector fully envelops the plug boot stem and terminal area—the zones most vulnerable to heat soak and UV degradation. The braided construction allows airflow while creating a thermal barrier, and the red coloring not only identifies the ignition system but also indicates the fiberglass weave structure that provides both flexibility and durability. This design prevents heat transfer from radiating components directly into the boot material, extending ignition reliability across repeated heat cycles and wide operating temperature swings typical of turbocharged, supercharged, or nitrous-fed engines.

Mechanics and engine builders routinely specify heat shield boot protectors for any modified engine where intake manifold or turbo outlet temperatures climb above 500°F, or where exhaust heat radiates into the spark plug wells. The pair format covers two cylinders, making this ideal for upgrading critical plug positions—such as those nearest to turbo flanges or exhaust ports—in four, six, and eight-cylinder applications. Installation is straightforward: simply slide the braided shield over the existing boot before final engine assembly or retrofit. Compatibility with 135-degree boots is universal across most domestic and import platforms using standard top-feed or side-feed ignition coils, and the slim 1.2-inch outer diameter ensures no interference with valve covers, headers, or other tight bay components.