NGK Coil on Plug Boots are built to stringent OEM tolerances, combining original equipment fit, design and outstanding durability. NGK Coil on Plug Boots are manufactured using only premium silicone and always include any required internal springs and ferrite resistors for superior performance and RFI noise suppression. Bridging the important link between ignition coil and spark plug, COP boots should always be replaced with NGK Coil on Plug Boots at the time as changing spark plugs to prevent ignition problems such as flashover. NGK Coil on Plug Boots provide original equipment design and fit, outstanding durability, and excellent suppression of EMI/RFI to protect all vehicle electronic components. Tested to meet or exceed OE specifications.

LIMITED LIFETIME WARRANTY: See package for details

The NGK Part 58921 Coil on Plug Boot is engineered to meet strict OEM standards, ensuring a precise fit and reliable performance for your vehicle's ignition system. Constructed from high-quality silicone, this boot offers excellent durability and resistance to heat, chemicals, and electrical stresses. It includes necessary internal springs and ferrite resistors to optimize ignition performance and effectively suppress RFI noise, thereby protecting sensitive vehicle electronic components. Replacing the coil on plug boots alongside spark plugs helps prevent ignition issues such as flashover, ensuring smooth engine operation and reliable starts.

Designed to fit a range of vehicles including the 2005-2006 Hummer H3, 2004-2005 Buick Rainier, 2005 Saab 9-7x, 2005 Isuzu Ascender, and 2005 GMC Envoy and Trailblazer models, this OEM-equivalent ignition component guarantees seamless integration with your existing ignition system. Its design preserves original equipment fit and function, making installation straightforward and hassle-free. The boot’s robust construction and superior EMI/RFI suppression protect vehicle electronics from interference, maintaining optimal engine performance and fuel efficiency.

Backed by a limited lifetime warranty, the NGK Coil on Plug Boot offers a long-lasting solution for ignition system maintenance. It is manufactured without prop 65 chemicals, adhering to safety standards, and is suitable for use in vehicles requiring direct ignition coil boots. Proper replacement of these boots is essential for preventing ignition misfires, improving engine reliability, and extending the lifespan of your vehicle’s ignition components. Trust NGK’s commitment to quality and performance to keep your vehicle running smoothly and efficiently.

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