KM 12 Valve Billet Valve Cover (123012-1) for 1989-1998 Cummins 5.9L

Product Description

The Keating Machine 12 Valve Billet Valve Cover is a precision-machined upgrade for 1989–1998 Cummins 5.9L 12-valve engines. This cover replaces the factory stamped-steel unit with a rigid billet aluminum design that improves sealing, durability, and overall engine bay appearance.

Keating Machine CNC-machines this valve cover from high-strength billet aluminum, which eliminates the flex and warping commonly seen with OEM steel covers. As a result, the cover maintains consistent sealing under heat, vibration, and boost. This makes it a reliable solution for both stock and high-performance applications.

In addition, the integrated O-ring sealing system removes the need for a traditional gasket. This design provides a leak-free seal that holds up under heavy load, extended run time, and elevated crankcase pressure. The smooth billet finish also delivers a clean, refined look that fits perfectly in performance builds, restorations, and show-quality engine bays.

This non-notched version is designed for engines running aftermarket or modified fuel line setups. Stainless steel mounting hardware is included, allowing for a straightforward bolt-on installation with no modifications required.

Features & Details

• CNC-machined from high-strength billet aluminum

• Direct replacement for factory stamped-steel valve cover

• Fits 1989–1998 Cummins 5.9L 12-valve engines

• Integrated O-ring sealing system for leak-free operation

• Eliminates gasket-related failures and oil seepage

• Smooth billet finish for a clean, refined engine bay appearance

• Non-notched design for aftermarket or modified fuel line setups

• Includes stainless steel mounting hardware

• Designed for street, performance, restoration, and show applications

Applications

• 1989–1998 Cummins 5.9L 12-valve engines

• Performance street trucks

• Engine restorations

• Custom and show builds