Part Notes: 2WD, 2500, 2015-18, 5.7, 6.4L Mega Cab, With Rear Air Suspension, Without 20" Tires;2WD, 2500, 2015-18, 6.7L Crew Cab SWB, With Rear Air Suspension, Without 20" Tires;2WD, 2500, 2015-18, 6.7L Mega Cab, With Rear Air Suspension, Without 20" Tires;4WD, 2500, 2014-18, 6.7L Crew Cab SWB, Without 20" Tires;4WD, 2500, 2014-18, 6.7L Mega Cab, With Rear Air Suspension, Without 20" Tires