For 2003-2018 5.9L / 6.7L Cummins applications up to 700 hp / 1,250 ft-lbs torque, Fluidampr recommends damper installation with the High Strength Bolt Kit for secure mounting. Kit features heat treated, high strength bolts from ARP? and a diamond impregnated friction washer. Harmonic Balancer - Fluidampr - Installation Kit - 2003-2018 6.7L / 5.9L Cummins - Up to 700hp/1250tq 5.9/6.7 Cummins -under head length 1.725* -thread 12mm x 1.25 -head size 9/16* 12pt (14mm) 2003-2018 Dodge / Ram 5.9L and 6.7L Cummins. Up to 700hp / 1250ft-lbs torque.