KM 12 Valve Billet Valve Cover-Notched for Stock Lines (123012-2N) for 1989-1993 First Gen Cummins 5.9L
$682.45
Billet aluminum valve cover for 1989–1993 Cummins 5.9L 12-valve engines. Features a precision-machined notch for stock injection line clearance, integrated O-ring sealing, and a durable performance-ready design.
Billet Valve Cover Overview
The KM 12 Valve Billet Valve Cover – Notched for Stock Lines is a premium upgrade for 1989–1993 First Gen Cummins 5.9L 12-valve engines. Machined by Keating Machine from high-strength billet aluminum, this cover replaces the factory stamped steel valve cover with a stronger, more durable, and visually refined component.
Design and Fitment
This version features a precision-machined notch designed to clear factory injection lines on VE-pump first-generation Cummins engines. As a result, it installs cleanly without modification while maintaining proper line routing and factory fitment.
Sealing and Durability
An integrated O-ring sealing system eliminates the need for a traditional valve cover gasket. This design improves sealing reliability and helps prevent leaks caused by heat, vibration, and boost pressure. In addition, the billet construction provides increased rigidity compared to the OEM steel cover.
Compatibility and Use
This valve cover maintains full compatibility with the OEM breather assembly, making it suitable for restorations, performance builds, engine swaps, and show-quality engine bays. Moreover, it delivers both functional improvements and a clean, upgraded appearance.
Why It’s a Solid Upgrade
Built for durability and precise fitment, this billet valve cover offers a dependable solution for first-gen Cummins owners who want improved sealing, strength, and engine bay presentation without sacrificing factory compatibility.
🧩 Features
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CNC-machined billet aluminum construction
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Notched design for factory injection line clearance
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Integrated O-ring sealing system
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Improved leak resistance over OEM stamped steel cover
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Compatible with OEM breather assembly
| Weight | 10 lbs |
|---|---|
| Dimensions | 31 × 7 × 7 in |
Fitment
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1989–1993 Dodge Ram 2500 / 3500
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Engine: 5.9L Cummins 12-Valve (First Gen, VE Pump)
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Correct bolt pattern for factory first-gen valve cover mounting
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Works with factory breather system
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Not compatible with 1994+ P-pump valve cover patterns
Features
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CNC-machined billet aluminum construction
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Notched for first-gen stock injection line clearance
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Integrated O-ring sealing system — no gasket needed
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Stronger and more rigid than OEM stamped steel
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Clean performance appearance
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Stainless hardware included
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Direct bolt-on fit
Includes
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Billet aluminum valve cover (notched for first-gen stock lines)
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Integrated O-ring seal
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Stainless steel mounting hardware
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