Part Notes: 2WD, Regular Cab, 6.4L, Without Rear Air Shocks;4WD, Without Electronic Disconnect, Crew Cab, With Rear Air Shocks, Long Box, 6.4L;4WD, Without Electronic Disconnect, Crew Cab, Without Rear Air Shocks, 6.7L;4WD, Without Electronic Disconnect, Mega Cab, 6.4L, With Rear Air Shocks;4WD, Without Electronic Disconnect, Mega Cab, 6.7L;4WD, Without Electronic Disconnect, Regular Cab, 6.4L, With Rear Air Shocks;4WD, Without Electronic Disconnect, Regular Cab, 6.7L