This listing is for a set of six (6) spark plugs. The spark plugs are from Motorcraft and they are an OE service replacement part. The spark plugs are NEW and unused. The part number on the spark plugs for this listing is AGSF-42-FM. These plugs do replace the former AWSF prefix plugs on some of the applications. Now they are threaded all the way up to the tapered seat. These plugs are finewire platinum-nickel centerwire electrode with nickel plated shell. Recommended service intervals on these plugs is up to 100,000 miles depending on driving conditions. Retail on the set of eight is over $50.00. I also have other Motorcraft spark plugs in stock including colder heat ranges on these applications. Email me if interested. On the listing below, following the engine size is the engine ID code. This is the eight digit of your vehicle's VIN number. These plugs are for the following applications.