With an aim to provide maximum satisfaction to our clients, we are indulged in manufacturing, exporting and supplying of toyota auto spark plug series 90919-01249 90919-01247 in Guangzhou, Guangdong, China. Spark Plug has a role to ignite and make an heat inside engine. it makes a piston move up and down. This movement will communicate power to a drive chain or a V belt. This small part has a big role to work engine. The spark plug's secondary function is to remove heat from the combustion chamber (the primary function is discussed above). The figure below shows a general structure of spark plug. The actual heat distribution will vary depending on the operating conditions and cylinder head and spark plug design.