Product Description
MAHLE HS4961 cylinder head gasket set delivers OE-level sealing for the legendary 3.9L Cummins 4B/4BT/4BTA (239 CID). Built to MAHLE Original specs, this standard-thickness head set includes the critical upper-engine gaskets and seals you need to complete a proper head service on industrial, step-van, swap, and power-unit 4BT applications.
Fitment
- Engine: Cummins 4B / 4BT / 4BTA 3.9L (239 CID), two-valve configuration.
- Standard thickness. Verify bore (~4.02" / 102 mm) and component list for your CPL/application before install.
What’s Included
- Standard-thickness cylinder head gasket
- Associated upper-engine gaskets & seals for a typical head job (intake/exhaust manifold, valve cover, injector/inlet seals as applicable to HS4961)
- Head bolts/studs not included.
Cross-Reference / OE Numbers
- Cummins upper/head set: 3804896 (supersedes 3802361, 4089648)
Related MAHLE Items (Internal Links)
- MAHLE HS4961-2 Head Gasket Set – +.010" Over
- MAHLE HS4961-3 Head Gasket Set – +.020" Over
- MAHLE CS4961 Lower (Conversion) Gasket Set – 3.9L 4BT
Why MAHLE
- OE-grade materials and emboss patterns for heat-cycle durability
- Consistent clamp-load retention and reliable port sealing
- Trusted solution for stock rebuilds and hardworking fleet/service engines
Installation Notes
- Inspect head/block for flatness and surface finish; prep per Cummins spec
- Follow proper torque sequence and fastener spec; use new bolts/studs
- After initial heat cycles, re-check fasteners where applicable
FAQ
Will HS4961 fit my 4BT swap?
Yes—HS4961 is the standard-thickness head set for most 3.9L 4B/4BT/4BTA builds. Confirm by engine family and CPL.
What if my head/block has been surfaced?
Use an oversize thickness set if needed: HS4961-2 (+.010") or HS4961-3 (+.020").
| Attribute | Value |
|---|---|
| Brand | MAHLE Original |
| Part Number | HS4961 (standard thickness) |
| UPC / GTIN | 00725975582336 | UPC: 725975582336 |
| Bore Reference | ≈4.02" (102.0 mm) |
| Shipping Info | Free shipping from CPP Diesel; typical tray/flat-pack. Product page lists approx. 10.00" W × 1.25" H × 24.00" D. |
| Country of Origin | Mexico (per product page) |
| 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. More info: www.P65Warnings.ca.gov. |
