If your vehicle is listed on the fitment table below, the product will fit your car - we guarantee it. All you need to do is to ensure that the vehicle's Year, Make, Model, Trim, and any other notes specified inside the fitment table are respected.
Included warranty:
For warranty coverage information, please see our
Warranty Policy.
Walker Products Spark Plug Boot Kits are professional-grade OE Replacement solutions designed to restore the integrity of the ignition system by replacing worn or damaged spark plug boots. Over time, boots can become brittle, cracked, or oil-soaked—leading to poor insulation, misfires, and ignition failure. These kits include premium-grade boots, insulators, and spring terminals built to match OE specifications for fit, dielectric strength, and thermal resistance. Each component is manufactured using high-quality materials engineered to withstand the high-voltage environment of modern ignition systems, along with the heat, vibration, and chemical exposure found in today’s engine bays. With exact OE fitment and factory-style geometry, installation is quick and secure—no trimming or modification required. Ideal for maintenance, tune-ups, or coil-on-plug repairs, Walker Spark Plug Boot Kits restore spark delivery, protect against arc-through or voltage loss, and support consistent engine performance, fuel economy, and emissions control.
Characteristics include:
Restores Ignition Seal Integrity: Replaces worn or damaged spark plug boots to maintain proper coil-to-plug connection and prevent misfires.
Improves Ignition Performance: Helps restore voltage insulation and spark delivery, supporting smooth idle, acceleration, and fuel efficiency.
OE Replacement Construction: Manufactured to match OE materials, dielectric strength, and thermal resistance for long-lasting reliability.
Heat & Vibration Resistant: Designed to withstand extreme engine temperatures, vibration, and exposure to oil or fuel vapors.
Exact OE Fit: Engineered for 100% OE fit with factory-style dimensions for easy installation without modifications.
Some of the interchangeable part numbers are:
5421BK | 584009
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The site was very easy to use. When I emailed with a question the response came quickly. I appreciated that you verified that the parts would fit my vehicle. I will use the site again.