Includes (1) Spark Plug. Thread: 14mm, Threadeach: 12.7mm, Seat type: flat, Hex size: 21mm, Type: Standard, Terminal type: Solid, New, Bulk Packed. Genuine OEM Replacement Part # L77JC4. Consult owners manual for proper part number identification and proper installation. Please refer to list for compatibility. Compatible with the Following: Top performance.