KM 12 Valve Billet Valve Cover-Black Anodized-Notched for Stock Lines (123012-1N-Black) for 1989-1998 Cummins 5.9L

Built for 12-Valve Durability and Clean Engine Bays

The Keating Machine 123012-1N-Black Billet Valve Cover is a premium upgrade for 1989–1998 Cummins 5.9L 12-valve engines, delivering improved strength, sealing performance, and under-hood appearance over the factory stamped steel cover. CNC-machined from high-strength billet aluminum and finished in a sleek black anodized coating, this cover resists flex, heat, and vibration common in high-mileage or high-boost applications.

Notched Design for Stock Injection Line Clearance

This version features a precision-machined notch designed to clear factory injection lines, allowing a true bolt-on installation with OEM fuel system components. No line modification is required, making it ideal for stock restorations, refreshed engine bays, or reliable daily-driven builds.

Leak-Free O-Ring Sealing System

An integrated O-ring sealing system replaces traditional gaskets, providing a consistent, leak-resistant seal that holds up under boost, temperature swings, and engine vibration. This design helps eliminate common oil seepage issues found with factory valve covers.

Direct Bolt-On with OEM Compatibility

The billet valve cover retains compatibility with the factory breather system and includes stainless steel mounting hardware for corrosion resistance and long-term durability. It installs cleanly and works equally well for performance builds, show trucks, or refreshed original engines.

Billet Valve Cover Built for Real-World Use

This billet valve cover supports Cummins 5.9L 12-valve engines used in street trucks, work trucks, restorations, and custom builds. Unlike factory stamped steel covers, billet aluminum resists flex under heat and vibration. That rigidity helps prevent oil leaks over time.

The integrated O-ring sealing system removes the common gasket failure point found in OEM covers. It maintains even sealing pressure during high-boost operation and repeated heat cycles. As a result, oil stays contained during hard use.

The black anodized finish improves corrosion resistance and durability. It also delivers a clean, professional appearance under the hood. This makes the cover suitable for performance builds and detailed engine bays alike.

Because this version includes a notch for factory injection lines, it installs cleanly with stock fuel components. The cover bolts directly into place without cutting or modification. Supplied stainless hardware and the factory breather system complete the installation.