Engine Storage Plate GM LS Engines

The Engine Storage Plate GM LS Engines from Moroso is a precision-engineered valley dust cover designed to protect the critical intake valley area of GM LS-series engine blocks during storage, transport, or engine-out maintenance. Whether you're a serious gearhead rebuilding a performance mill, a shop technician managing multiple engine cores, or an enthusiast preparing an LS swap, this protective cover keeps debris, dust, and contaminants out of the valley cavity where fuel injectors and intake runners converge. Without proper valley protection, even small particles can cause expensive damage during engine assembly or compromise fuel delivery precision.

Constructed from heavy-duty steel with a zinc oxide finish, the Engine Storage Plate measures 21.6 inches in length to span the full valley width of LS blocks, with a 0.125-inch thickness that provides rigid protection without unnecessary weight. The zinc oxide coating resists surface corrosion during extended storage, maintaining structural integrity and appearance through multiple engine builds. At just 4.3 pounds, installation is straightforward—the plate sits flush in the valley, creating a complete seal against airborne contaminants while allowing quick removal when you're ready to begin assembly or installation of intake manifolds and valley cover components.

This cover is essential for anyone running LS powerplants—from small-block LS1/LS2 platforms to large-displacement LS7 and LSX variants. Professional machine shops, engine builders, and restoration specialists rely on valley dust covers to maintain core inventory and protect in-progress builds on the stand. Install it immediately after initial block cleaning or during long-term storage to avoid costly rework before final assembly. Moroso's reputation for precision manufacturing ensures this plate fits GM LS valley geometry without interference, making it an economical insurance policy for serious engine work.