Genuine OEM Jaguar Spark Plug Gasket, part number AJ86874. This small, circular gasket is designed to create a tight seal around the spark plug pipe, effectively preventing oil or combustion gas leaks. It is a critical component for maintaining the integrity of the engine's sealing surfaces. Weighing a mere 0.003 kg, this gasket is made from high-quality, heat-resistant material. Using a genuine OEM gasket ensures precise dimensions, correct material composition, and reliable sealing performance, which is crucial for preventing engine damage and maintaining optimal engine operation.