Backed by the Motorcraft Service Parts Warranty which offers 2 years unlimited mileage limited labor cost and no commercial exceptions. Warranty is supported nationwide by Ford/Lincoln dealers and Ford Authorized Distributors. Delivering performance reliability and confidence Motorcraft spark plugs are available for a broad range of applications including domestic and import cars and trucks of all makes and sizes. Motorcraft spark plugs are matched to specific engines to provide enhanced durability eliminate misfires reduce fuel consumption and optimize emissions. Standard Copper Core Spark Plug Tested to Ford specifications for performance and emissions. Resistant to oxidation and arc erosion.