GM LT1/LT4 1993-1997 Camaro and Firebird Aluminum Water Pump OEM replacement. Aluminum Housing Material. Satin Finish. Stamped Steel Impeller Material. Gaskets Included. This LT water pump has been designed to meet or exceed all OEM specifications. It is precision cast for a perfect fit out of lightweight aluminum, with an added a heavy duty impeller shaft and bearings to ensure long-lasting performance. Direct replacement of stock 5.7 LT1/ LT4 1993-1997 Camaro and Firebird pump. GM part number: 12527741. Direct replacement of stock 5.7 LT1/ LT4 1993-1997 Camaro and Firebird pump. GM part number: 12527741.