NGK Spark Plugs for Supercharged LS Engines – Simple Engineering, LLC
Decoding Spark Plug Part and Stock Numbers - NGK Spark Plugs
NGK.com: NGK Spark Plug Numbering Systems
Spark Plug Part Finder - Product Catalogue | Niterra SA
Niterra Philippines, Inc. - It is always best to use or follow the specified spark plug part number recommended by your vehicle manufacturer or the latest NGK spark plug application catalog. Our