PRI 2025: This Billet Cam Covers Fix The Melting Coyote Problem

The Gen-3 and Gen-4 Coyote engines are engineering marvels, but they possess a frustrating weak link once you start adding serious horsepower. The factory valve covers are made of composite plastic, which works fine for a standard commuter car, but can fail under the stress of a high-performance build. Heat cycles and boost pressure eventually cause the plastic to warp, leading to oil leaks that are a nightmare to fix. Livernois Motorsports brought the ultimate solution to the 2025 PRI Show with their heavy-duty billet cam covers.

JP Lammers, a project manager at Livernois, told us the idea was born from a desire to see what their new CNC equipment could handle. The team scanned the original OEM cover to ensure perfect fitment and then machined a replacement from high-strength billet aluminum. While they look incredible, the real reason these exist is heat management. Lammers specifically pointed out the twin-turbo F-150 community as a major catalyst for this product. On those trucks, the turbos are often mounted extremely close to the engine, creating enough radiant heat to soften or even melt the stock plastic units.

The new billet cam covers provide a 30-fold improvement in resistance to thermal deformation. This rigidity ensures that the gasket stays compressed evenly around the entire sealing surface, preventing the leaks that plague the stock components. Livernois also took the opportunity to improve the internal airflow. The revised breathing passages help manage crankcase pressure more effectively than the stock design, which is a massive benefit for supercharged and turbocharged engines that generate significant blow-by.

Despite being a race-grade part, these covers are designed to live on street cars. They retain all factory mounting points for fuel lines, ignition coils, and sensors. They are fully compatible with the stock oil dipstick and the factory direct-injection system, though you can block off the DI port if your build does not require it. Livernois is also offering custom anodizing and engraving options for builders who want to match a specific color scheme. It is rare to find a part that fixes a mechanical failure point while also serving as the centerpiece of an engine bay, but these covers manage to do exactly that.