Agricultural Spark Plug Copper Core 14mm Thread - Champion 515 (D15Y) (3-PACK) Deliver reliable ignition and long-lasting performance with the Champion 515 (D15Y) Spark Plug ? a high-quality copper core spark plug engineered for demanding applications in trucks and agricultural equipment. Designed to thrive in high-compression engines and aggressive operating environments, this plug ensures consistent starts, efficient combustion, and dependable operation under heavy loads and extreme conditions. Featuring a copper core center electrode, the 515 plug provides excellent heat conductivity for accurate thermal management, helping prevent overheating and pre-ignition. The 14mm thread size and machined exterior ensure a secure, precise fit in compatible engines, while the nickel top material enhances durability and resistance to corrosion and wear. Manufactured by Champion Spark Plug with global engineering support from Federal-Mogul, this spark plug meets strict quality standards for performance and reliability. It is built for long service life and consistent spark delivery, making it ideal for use in diesel and gasoline-powered trucks, tractors, harvesters, mowers, and other farm or utility machinery. The plug is designed for universal fit and is a direct replacement for OEM applications requiring a 515 (D15Y) specification. Its robust construction ensures stable performance in high-heat, high-vibration environments commonly found in agricultural and heavy-duty service. Measuring 3.4 x 1.1 x 1.1 inches and weighing 14.4 ounces (per pack), this single-pack spark plug is easy to store and transport. It comes ready to install with no additional components required. Features - Champion 515 (D15Y) spark plug for truck and agricultural equipment - Copper core center electrode for superior heat control - 14mm thread size for secure, standard fit - Nickel top material resists corrosion and extends service life - Machined exterior ensures precise installation and sealing - Designed for high-compression and heavy-duty engine applications - Universal fit for a wide range of diesel and gasoline engines - Engineered for reliable ignition in extreme operating conditions - Backed by Champion?s global engineering and quality standards - Ideal for tractors, trucks, mowers, and farm machinery Specifications - Brand Name: Champion - Model Name: Champion 515 (D15Y) - Part Number: 515 - OEM Part Number: 515 - Manufacturer Part Number: 515 - UPC: 037551647002 - Global Trade Identification Number: 00037551647002 - Product Type: Spark Plug - Core Material: Copper - Top Material Type: Nickel - Thread Size: 14mm - Exterior: Machined - Vehicle Service Type: Truck - Automotive Fit Type: Universal Fit - Item Weight: 14.4 oz - Product Dimensions: 3.4 x 1.1 x 1.1 inches - Number in Package: 1 - Manufacturer: Champion Spark Plug - Country of Origin: United States Product Application The Champion 515 (D15Y) Spark Plug is designed for use in heavy-duty trucks and agricultural machinery requiring a durable, high-performance ignition solution. Ideal for tractors, combines, utility vehicles, and diesel engines, it delivers reliable starts and consistent combustion in demanding field and road conditions. Its copper core and rugged construction make it suitable for high-heat, high-vibration environments where standard plugs may fail. Trusted by farmers, fleet operators, and mechanics, this spark plug offers proven performance, easy installation, and long-term durability in essential equipment. Always verify engine compatibility before installation.