MAHLE 4961-2 HEAD GASKET (.25MM) FOR 89-98 4BT CUMMINS 3.9L ENGINE

Product Description

Restore proper quench and sealing after machining with the MAHLE 4961-2 head gasket for the Cummins 4B/4BT 3.9L (1989–1998). This +0.25mm (+.010") oversize gasket matches OE form/fit and is ideal when deck and/or head surfacing requires a thicker gasket to maintain compression and durability under towing or work-truck loads.

Mahle 4961-2 head gasket, 4BT 3.9L .010 thicker gasket, Cummins 4B oversize head gasket, CPP Diesel Mahle 4961 family, 0.25 mm head gasket Duramax style composite, 4BT quench correction, industrial 4B swap gasket, B-series Cummins cylinder head gasket +.010

Fitment

• 1989–1998 applications using the Cummins 4B/4BT 3.9L (239 CID), 2-valve configuration
• Common in step vans, medium-duty trucks, industrial/off-highway, and retrofit swaps (verify by engine family/CPL)

Cross-Reference / Alternatives (Mahle on CPP Diesel only)

• MAHLE HS4961 (Standard Thickness Head Set)
• MAHLE HS4961-2 (+.010 Head Set)
• MAHLE HS4961-3 (+.020 Head Set)

Notes

Always confirm oversize needs after measuring piston protrusion and verifying head/block flatness and surface finish per Cummins service specs.

FAQ

Is +0.25mm the same as +.010"?

Yes—+0.25mm is approximately +.010". Choose this thickness when machining has reduced assembled height and you need to restore quench.

Does this fit all 4BT years?

It fits 4B/4BT 3.9L two-valve engines typically found from 1989–1998. Verify by engine family/CPL rather than vehicle badge.

Are head bolts or studs included?

No. Pair this gasket with quality head studs/bolts and follow the correct torque-angle procedure for best long-term sealing.

Specifications for Mahle 4961-2