GM LS Alm R/R Oil Pan

The MOROSO GM LS Aluminum Rear Sump Oil Pan (Part No. 21152) is a purpose-built engine accessory designed for GM LS-series engine swaps and performance builds. This rear-sump configuration accommodates chassis layouts where traditional front-sump pans create clearance conflicts—a critical consideration in engine conversion projects, custom fabrication, and modern restomod applications where LS power plants are transplanted into vehicles not originally equipped with them.

The pan features aluminum construction in natural finish, offering both weight savings and corrosion resistance compared to steel alternatives. Its 7-quart capacity and 6-inch depth are engineered to maintain adequate oil volume while minimizing ground clearance intrusion—a key trade-off in lowered vehicles and suspension-modified platforms. The aluminum body dissipates heat efficiently during extended driving or high-performance use, contributing to stable oil temperatures across varying driving conditions. This design integrates seamlessly with LS-series engine oil pickup and return systems, maintaining proper circulation and filtration flow rates essential for engine longevity.

This pan is the preferred choice for fabricators and enthusiasts performing LS swaps into classic trucks, sports cars, and custom builds where rear sump mounting is either necessary or advantageous. Its compatibility with various GM LS applications—including LS1, LS3, LS7, and LSA variants—makes it a versatile component for both street and track-oriented builds. Whether you're managing tight engine bay constraints or optimizing ground clearance for a lowered platform, the rear-sump configuration eliminates the fitment compromises common with standard front-sump designs.