Solid state suppressor, with two-piece glass and brass seal, can help reduce radio frequency interference, regulates spark energy for long electrode life, and helps protect against high combustion pressuresPure copper core provides great heat transfer and helps maximize plug durabilityPlatinum on center electrode enables superior spark characteristics and can reduce voltage requirements of the ignition systemRibless insulator helps optimize plug to boot sealACDelco Professional RAPIDFIRE Single Platinum Performance Spark Plugs are designed for everyday use and are the high quality replacement ideal for many vehicles on the road today. These premium aftermarket spark plugs have high-quality suppressors that help prevent misfiring, an improved plug to boot seal, and a pure copper core for greater durability. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.