Installation Instruction Spark Plugs 7 8 9a 90° Nm M10 x 1 12 Nm 90° M12 x 1,25 23 Nm 90° M14 x 1,25 < 13 mm 17 Nm 90° M14 x 1,25 > 13 mm 28 Nm 90° M18 x 1,5 38 Nm 90° 9b M12 x 1,25 Nm 23 Nm Automotive Aftermarket | 02.2016