The ultimate solution for your clean, retro-styled LS.

When you're building a classic restomod, the goal is to showcase the engine, not the plumbing. Modern LS platforms are notorious for their messy PCV hose routing and external catch cans, which instantly ruin a vintage aesthetic. We designed this custom Gen III LS Valley Cover specifically for builders who want a completely clean top end without sacrificing proper crankcase ventilation.

The standout feature of this cover is the completely hidden PCV system. We’ve engineered a high-efficiency breather and filter unit that integrates directly underneath the valley plate. It does the heavy lifting of venting crankcase pressure and filtering oil vapors, while remaining 100% invisible from the top down.

No external breather tanks. No ugly hoses crisscrossing your intake manifold. Just a sleek, uninterrupted block.

Key Features:

• True Stealth PCV: The integrated underside breather and filter assembly manages crankcase pressure completely out of sight.

• Zero Clutter: Eliminates the need for traditional external PCV hose routing, making it the perfect foundation for retro-look engine packages and carb-style intakes.

• Direct-Fit Gen III: Engineered to bolt flawlessly onto all Gen 3 LS engine blocks (LS1, LS6, LM7, LQ4, LQ9, etc.).

• Premium Machining: Crafted from [6061 Billet Aluminum] for a rigid, leak-free seal and a premium finish.

• Low-Profile Design: Sits flush to accommodate a wide variety of aftermarket and retro-style intake manifolds and is fastened with countersunk hardware.

Take your LS swap to the next level with a valley cover that works hard and stays completely out of sight.