Bristol 401 Spark Plugs

Champion Copper Plus spark plugs deliver dependable ignition performance with proven copper-core technology. The copper core electrode provides excellent conductivity and optimized heat control for consistent sparks while the coated shell protects against corrosion. Champion your engine with spark plugs engineered to improve efficiency and keep your vehicle running at its best.

Autolite Copper spark plugs are designed to provide reliable performance and quick starts, ensuring your vehicle meets its power and efficiency needs. Featuring a copper core center electrode, these spark plugs excel in thermal control and resist fouling, enhancing overall durability. The high nickel alloy center and ground electrodes are engineered for extended life, while the high alumina multi-rib ceramic insulator offers superior thermal conductivity and insulation for added strength. With a nickel-plated shell, these spark plugs resist corrosion, ensuring long-lasting performance even in demanding conditions. Designed with a flat seat type and short projection center electrode, they deliver consistent functionality. Additionally, their optimized design promotes better fuel economy, helping you maximize every gallon of fuel. Ideal for regular-grade applications, these spark plugs combine durability, efficiency, and reliability to keep your engine running smoothly.