Spark Plug Boot and Ignition Heat Shields

At Heatshield Products, we are the original spark plug heat shield company. From our very first models made back in 1985 to the full line of plug boot insulation products we have today, we have the heat shields you need to keep dominating on the track.

  • Solutions to help prevent misfires

  • Prevent silicone boots from cracks

  • Solutions for spark plug wires

  • Made in the USA

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Buy a Spark Plug Wire Heat Sleeve

Prevent misfires, protect your engine, and increase ignition-system performance with a spark plug heat shield. These heavy-duty plug boot sleeves are designed to extend your plug wire and boot life and reduce ambient heat exposure for improved performance. In our quality spark plug wire heat sleeve collection, we offer a variety of models and materials to suit the needs and individual aesthetic of your vehicle.

Choose Your Color with an Insul-Boot™ Spark Plug Heat Shield

Introduced over 20 years ago in our original collection, our Insul-Boot™ spark plug boot shields let you choose the look you want while enjoying the benefits of double-walled fiberglass construction and special heat treatment. These convenient spark plug wire heat sleeves can bend up to 90° to fit most spark plugs on the market and are designed to withstand temperatures up to 1200°F continuous or 2000°F intermittent. Choose from our diverse colors and take advantage of our 2-packs and 8-packs for a sleek, matching look.

Protect Your Spark Plugs with a Lava Boot Shield

For the extreme temperatures of the racetrack, our Lava Boot volcanic spark plug heat shield offers superior heat reflection and easy installation. Designed for regular and LS applications, the Lava Boot Shield prevents plug and wire burnout and protects wires and boots from radiant heat damage. Browse our standard sizes or request a custom size for your vehicle.

Tackle High Temperatures With Our HP Boots™

When you need a heavy-duty spark plug wire heat sleeve, our HP Boots™ have you covered. Made from 304 stainless steel and ceramic, our HP Boots™ come in three different angles—straight, 135 degrees, and 90 degrees. These sleeves are the highest-performing models in our collection with a temperature resistance of up to 1800°F continuous and 2200°F intermittent.

Increase Your Vehicle’s Performance with Heatshield Products

At Heatshield Products, we know the importance of power on the racetrack, and we’re here to help you maximize your vehicle’s potential. Contact us for customized spark plug heat shield solutions and shop our automotive, moto, and industrial heat shields today. Keep Cool and Go Fast with Heatshield Products.

Proposition 65 requires businesses to provide warnings to Californians about significant exposures to chemicals that cause cancer, birth defects or other reproductive harm. These chemicals can be in the products that Californians purchase, in their homes or workplaces, or that are released into the environment.