Spark plug set Jenbacher 21287018 original P7V3.i for 2, 3 and 4 series Predecessor: 1233808 ; 123-3808 ; 123 3808 351000 ; 351-000 ; 351 000 1 Set = 4x Spark plugs in a tin // P7V3.i Applications NOx: 500 mg/Nm³ at 5 % Oxigen (O2) For special gases, when the normal versions must be cleaned very often. Gap with new plugs, 035mm BMEP < 19 bar