Windage Tray GM LS w/ARP Main Cap Studs

The MOROSO Windage Tray for GM LS with ARP Main Cap Studs is a louvered steel windage management component engineered to optimize crankcase ventilation and oil return in high-performance LS-series engine builds. This rear sump design minimizes windage losses—the energy wasted when the crankshaft churns oil during rotation—enabling more power to reach the wheels while improving oil aeration and cooling efficiency.

Constructed from natural steel and featuring precision-louvered vanes, this windage tray directs oil away from rotating assembly contact points and back to the oil pan. The inclusion of ARP main cap studs reinforces the critical main bearing area, a vital consideration for engines producing elevated power levels or subjected to aggressive track duty. The tray measures 24.5 inches in length and spans 6.5 by 6.25 inches in width, engineered to fit the LS-series engine bay envelope. Weighing 3 pounds, it adds minimal mass while delivering measurable reductions in parasitic drag.

This component is specified for LS-series engine builders, engine swap platforms, and performance shops targeting reliability and efficiency gains in street and competition applications. Windage trays become increasingly relevant as boost pressure, RPM, and power output increase—conditions that amplify oil churning losses. MOROSO's louvered design is recognized within the engine building community for consistent results across naturally aspirated and supercharged LS builds.

Installation requires removal of the oil pan and main cap fasteners, making it ideal for builds already in tear-down phase. Proper fitment and clearance verification against your specific intake manifold, oil pump, and pan configuration is recommended before final assembly. The natural steel finish requires protection from corrosion—most builders apply engine enamel or high-temp coating during engine dress-out.