Fits HEMI MDS VVT eTorque Engine.; USE ON OR AFTER 04/09/21; Sedan/Quad Cab Short Wheelbase; 8-Spd Auto 8HP75 Trans; Lt. Duty 4WD or HEMI MDS VVT eTorque Engine.; USE ON OR AFTER 04/09/21; Sedan/Quad Cab Short Wheelbase; 8-Spd Auto 8HP75 Trans; Lt. Duty 2WD or HEMI MDS VVT eTorque Engine.; USE ON OR AFTER 04/09/21; Crew Cab; 6'4" Box; 8-Spd Auto 8HP75 Trans; Lt. Duty 4WD or HEMI MDS VVT eTorque Engine.; USE ON OR AFTER 04/09/21; Crew Cab; 6'4" Box; 8-Spd Auto 8HP75 Trans; Lt. Duty 2WD or HEMI MDS VVT eTorque Engine.; USE ON OR AFTER 04/09/21; Crew Cab; 5'7" Box; 8-Spd Auto 8HP75 Trans; Lt. Duty 2WD or HEMI MDS VVT eTorque Engine.; USE ON OR AFTER 04/09/21; Crew Cab; 5'7" Box; 8-Spd Auto 8HP75 Trans; Lt. Duty 4WD