Moroso 22943 Moroso GM LS w/ARP Main Cap Studs Louvered Windage TrayMoroso 22943 Moroso GM LS w ARP Main Cap Studs Louvered Windage Tray Fits: GM LS Engines with ARP Main Cap Studs and Moroso Rear Sump Oil Pans Fits: GM LS Engines with ARP Main Cap Studs and Moroso Rear Sump Oil Pans Louvered design allows oil thrown from the rotating assembly to drain into the sump without splashing back, reducing windage, increasing horsepower and cutting down on oil temperature Manufactured from 16 gauge steel Mounts right to the