Product Description
MAHLE HS4961-2 is a +.010" thicker cylinder head head set for applications using the 3.9L Cummins 4BT. Built with OE-equivalent materials for reliable sealing, this kit includes the upper-engine gaskets and seals needed for a proper head service. Head bolts/studs are not included.
- Engine: Cummins 4BT (3.9L / 239 CID)
- Gasket thickness: +.010" over standard
- Bore size reference: 4.02" (102.0 mm)
- GTIN/UPC: 027067094896
Fitment
- Applications equipped with the 3.9L Cummins 4BT (model years 1989–1998 era), including common industrial/light-duty swaps and vehicles originally or retrofitted with the 4BT.
Cross Reference / Related
- MAHLE HS4961 – Standard thickness head set (3.9L 4BT)
- MAHLE HS4961-3 – +.020" thicker head set (3.9L 4BT)
- MAHLE 4961-2 – Individual head gasket (+.25 mm / approx. .010")
FAQ
Is HS4961-2 thicker than stock?
Yes. HS4961-2 includes a head gasket that is approximately +.010" thicker than the standard thickness, helpful after machining or when additional compression adjustment is desired.
Will this fit any Dodge Ram from 1989–1998?
It fits applications using the 3.9L Cummins 4BT. Verify your engine is a 4BT (3.9L) and not a 5.9L B-series before ordering.
What bore size does the 4BT use?
The 4BT uses a ~4.02" (102.0 mm) bore. Always confirm bore and surface finish when selecting and installing head gaskets.
Are head bolts or studs included?
No. Add new head bolts or upgrade to studs during reassembly for best results.
