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; Electrode Gap [mm]: 0,5; TecDoc Engine Number: 4340; FERRARI: F355 BERLINETTA,F40 Coupe; 99906910X9023, J4520IU24, CR8EIX, 9900069835CR8, 9900079K24U24, 9079320122, 9079320124, 9079320150, 9079322094; Engine spark plug,Spark plugs