Product Description
CUMP358000, PISTON, W/PIN AND LOCKS 3 5/8 STD THRU +.040
(PLEASE NOTE THE CUMMINS/HOLSET TWIN REQUIRES 2 PISTONS AND SETS OF RINGS)
2 X 3.18 MM COMPRESSION GROOVES
1 X 4.76 MM OIL CONTROL GROOVE
3803930 = CUMP358000 + CUMRS358000