Spanner Size: 16 mm; Thread Size: M10 x 1,0; Thread Length [mm]: 19,0; Spark Plug: Unscrewable SAE connector, Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat; Spark Position [mm]: 1,0; MASERATI: 3200 GT Coupe,QUATTROPORTE IV; CR9EIX, 9900079A37U7E, 9079320123, 9079320125, 9079322086; Engine spark plug,Spark plugs