66380 33271 71 : CYLINDER ASSY, LIFT, TORCON & MISSION 7L diesel engines Type: 7L diesel engines Type: High capacity input clutch drum Capacity: 550 (likely referring to torque capacity) Features and Benefits Increased Holding Capacity: The drum is designed to significantly improve the clutch pack's ability to handle higher torque loads Enhanced Durability: Constructed to withstand the demands of high performance and heavy duty applications Improved Clutch Count: Capable of accommodating more clutches than stock drums Customer Support : Customers are advised to contact the supplier or distributor for any questions or inventory checks before ordering 66380 33271 71 : CYLINDER ASSY