Product Description

CUMMINS 3927154 OEM EXHAUST MANIFOLD GASKET – 5.9L CUMMINS (1989–1998)

Genuine Cummins 3927154 exhaust manifold-to-head gasket — engineered for direct OEM-spec fitment on 1989–1998 5.9L (12-valve) applications. This gasket restores proper sealing between the cylinder head and exhaust manifold, preventing exhaust leaks and ensuring reliable turbocharger spool and engine performance under heavy EGTs. Sold individually — six required per engine for a complete manifold service. Durable OEM-grade construction offers long-term heat-cycle reliability, and it’s the exact part specified for classic B-series 5.9L engines. If you’re reinstalling or servicing your manifold, this is the correct gasket to maintain factory sealing integrity.

Fitment / Compatibility

• 1989–1998 5.9L Cummins 12-Valve (6BT / B-series)
• Dodge Ram 2500 / 3500 (and other vehicles using 5.9L 12-valve Cummins during those years)
• Also common for industrial/off-highway B-series engines — verify by ESN or serial plate for non-automotive applications.

Cross References / Alternatives

• Cross-ref part numbers: 3901456, 3905443
• When performing manifold service, you may also consider replacing the turbo-to-manifold gasket (part # 3901356) for a complete seal refresh. 

FAQ

HOW MANY GASKETS DO I NEED? Six – one per cylinder head port. This listing is for a single gasket; order six for a full 6-cylinder 5.9 L Cummins engine.

WILL THIS FIT MY 1989–1998 5.9L CUMMINS RAM? Yes — this is the correct OEM gasket for 1989–1998 5.9 L 12-valve Cummins (Ram 2500/3500 and equivalent applications). Always verify by VIN/ESN if components have been changed. 

WHAT ARE THE COMMON CROSS-REFERENCE NUMBERS? 3901456 and 3905443 are the most frequently referenced cross-refs for this gasket. 

IS THIS A GENUINE CUMMINS PART? Yes — this is the genuine Cummins OEM 3927154 exhaust manifold gasket, not an aftermarket substitute. 

SHOULD I REPLACE OTHER GASKETS DURING MANIFOLD SERVICE? It’s best practice to also replace the turbo-to-manifold gasket (part 3901356) and inspect manifold hardware/studs while performing exhaust manifold service.