... DCEC camshaft widely use in the cummins B series engines:1.qsb3.9-30, qsb4.5-30, qsb5.9-44, g3.9 ... , 4b3.9, isb, 6b5.9, b5.9 gas, g5.9, b gas plus ... common rail fuel system), b5.9lpg, b lpg plus, qsb5.9-30, b4.5, b gas international, qsb5.9 (common rail ... fuel system), qsb6.7, isbe4 (6 cylinder), isbe4(4 cylinder), qsb4.5 2. ...