Excessive underhood heat degrades spark plug boots faster than almost any other wear mechanism, causing cracking, misfires, and frustrating drivability issues that are easy to prevent. The Pro-Boot Shield wraps each plug boot in Basalt Lava Fiber construction paired with a Tac Armor liner, blocking continuous heat up to 1,200°F and intermittent spikes up to 2,000°F before they reach the boot.
Basalt Lava Fiber construction outperforms standard fiberglass. The Pro-Boot Shield is built from Basalt Lava Fiber, which is 25% stronger than conventional fiberglass heat sleeve material. That added strength translates directly into longer service life and more reliable protection in tight, heat-saturated engine bays.
Tac Armor liner locks out heat, dirt, and debris. The interior Tac Armor liner adds a second layer of thermal insulation beyond what the outer sleeve provides. A hook-and-loop fastener seals the assembly closed, keeping contaminants away from the boot surface and maintaining a clean, professional appearance under the hood.
Fits straight and 135-degree plug boots without special tools. Installation takes minutes: slide the shield over the boot, press it fully onto the plug until it clicks, then wrap and secure the fastener. The design accommodates both straight boots and angled 135-degree boots, covering the layout requirements of modern DIS ignition systems.
Product Benefits
- Misfire Prevention: Blocks heat-induced boot degradation that leads to ignition misfires.
- 1,200°F Continuous Rating: Handles sustained underhood temperatures that damage stock boots.
- 2,000°F Intermittent Rating: Survives heat spikes from headers, exhaust manifolds, and turbos.
- Basalt Lava Fiber: 25% stronger than standard fiberglass for extended durability.
- Tac Armor Liner: Adds a secondary thermal barrier and resists abrasion, chemicals, oil, and acid.
- Hook-and-Loop Fastener: Seals out dirt and debris for a secure, rattle-free fit.
- Universal Boot Fitment: Installs over straight or 135-degree plug boots with no modifications.
- Made in the USA: Manufactured domestically by Heatshield Products.
About Heatshield Products: Heatshield Products has been engineering thermal management solutions for automotive, motorsport, and industrial applications since 1991. Every product in the lineup focuses on controlling heat to protect components and improve performance, backed by decades of development and real-world validation.
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