NGK Laser Iridium Spark Plug ILTR5E11 (Box of 4) for Select Buick, Cadillac, Chevrolet, and GMC 2002-2020

Fits select 2002-2020 Buick, Cadillac, Chevrolet, and GMC models including Silverado, Tahoe, Escalade, Corvette, and Trailblazer.

NGK Laser Iridium spark plugs are engineered as the ultimate OE-replacement solution, bridging the gap between high-efficiency performance and extreme longevity. These plugs feature a laser-welded iridium-tipped center electrode, a material six times harder than platinum, paired with a platinum chip on the ground electrode to ensure even wear in modern distributorless ignition systems (DIS).

Constructed with a 98 percent pure copper core and a high-grade pure alumina silicate ceramic insulator, these plugs provide superior heat dissipation and electrical insulation. The trivalent metal plating offers high-performance anti-corrosion and anti-seizing properties, making them ideal for long service intervals.

• Part Number: ILTR5E11
• Iridium-tipped center electrode for stable spark and durability
• Platinum ground electrode pad for consistent performance in DIS systems
• Pure alumina silicate ceramic insulator for superior strength and heat transfer
• Trivalent metal plating eliminates the need for anti-seize during installation
• Triple seals prevent combustion gas leakage
• Copper core aids in rapid heat removal to prevent overheating