Product Description
MAHLE HS4068B is the .50 mm / .020" over-thickness upper head gasket set engineered for the 1989–1998 5.9L 12-valve Cummins. Built to OE standards with composite head gasket and high-temp manifold gaskets, this kit restores sealing integrity after machining or when added thickness is required—perfect for tow rigs, work trucks, and fresh rebuilds that demand reliable clamping and heat management.
Fitment
- 1989–1998 Dodge Ram 2500/3500 with 5.9L 12-valve Cummins (6BT)—VE & P-pump years.
- Use .020" over after head/block surfacing or when service specs call for additional thickness to maintain piston-to-head clearance.
Cross-Reference / Alternatives (Mahle on CPP Diesel only)
- MAHLE HS4068 (Standard thickness) – 1989–1998 5.9L 12V
- MAHLE HS4068A (.010" over) – 1989–1998 5.9L 12V
- MAHLE 4068E Single Head Gasket (.020" over) – 1989–1998 5.9L 12V
- MAHLE CS4068 Lower Engine Gasket Set – 1989–1998 5.9L 12V
What’s Included
- .020" over-thickness head gasket
- Upper-engine gaskets and seals (intake, exhaust, and related)
- Head bolts/studs not included
Install Notes
- Confirm required thickness (.020" over) per machining/service measurements.
- Clean deck surfaces thoroughly; follow OE torque sequence and specs.
- Pair with CS4068 for a complete reseal.
FAQ
Is HS4068B definitely the .020" over head set?
Yes—HS4068B is MAHLE’s .50 mm (.020") thicker upper head gasket set for the 5.9L 12-valve Cummins.
When should I choose .020" over instead of standard?
Use .020" over after machining the head/block or when specs call for added thickness to maintain proper piston-to-head clearance and compression.
What else do I need for a full top-end job?
Add new head bolts or studs (sold separately) and consider the MAHLE CS4068 lower set for the bottom end.
Specifications for Mahle HS4068B
| Attribute | Value |
|---|---|
| Brand | MAHLE / Clevite |
| Part Number | HS4068B |
| UPC / GTIN | 725975873403 |
| Gasket Thickness | .50 mm (.020") over |
| Shipping Info | Free Shipping; typical pkg. dims 8.00" W × 1.25" H × 30.00" D. |
| Country of Origin | Not specified |
| Prop 65 | This product can expose you to chemicals including lead and lead compounds, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov. |
