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2 0 12 90 / 2 0 2 10  RACING SPARK PLUGS

φ                                            Heat range

               Heat range                   Spark plug type
            Spark plug type                 Terminal shape
            Terminal shape                  Center electrode material
            Center electrode material       Ground electrode material
            Ground electrode material
                                             Heat range
φ
                                            Spark plug type
               Heat range                   Terminal shape
            Spark plug type                 Center electrode material
            Terminal shape                  Ground electrode material
            Center electrode material
            Ground electrode material

φ

               Heat range
            Spark plug type
            Terminal shape
            Center electrode material
            Ground electrode material

               Heat range
            Spark plug type
            Terminal shape
            Center electrode material
            Ground electrode material

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