Cummins 4089819 — Genuine Upper Engine Gasket Kit for ISB 5.9L (Common-Rail)

MPN: 4089819  |  Also Known As: top-end gasket set, head set, upper gasket kit

Genuine Cummins upper engine gasket kit engineered for HPCR ISB 5.9L applications. Purpose-built for top-end refreshes, head gasket jobs, and cylinder head swaps on 2003–2007 Ram 5.9L. Includes the critical gaskets, seals, and washers needed to reseal the top end with OE fit and durability.

Features & Benefits

• OE materials & profiles for reliable sealing on HPCR ISB 5.9L.
• Comprehensive kit—reduces guesswork and repeat tear-downs.
• Standard-thickness head gasket configuration (confirm thickness by ESN/piston protrusion if required).
• Direct-fit drop-in for 2003–2007 Ram 2500/3500 5.9L common-rail.
• Backed by Cummins for quality and long service life.

Verified Fitment (Automotive)

Industrial/Off-Highway: Used primarily on EPA ’04-era ISB/QSB 5.9 HPCR—verify by ESN for specific equipment coverage.

Specifications

• Type: Upper/top-end gasket set
• OE Part Number: 4089819
• Platform: ISB 5.9L HPCR (2003–2007 Ram)
• Includes: Head gasket (standard configuration), valve cover, intake & exhaust manifold, injector and turbo sealing items, rocker housing, thermostat/oil drain seals, sealing washers, and assorted O-rings (see “What’s In The Box”).

Often Paired With

• Lower Engine Gasket Kit: Cummins 4089173 (bottom-end reseal)
• Head Bolts/Studs: new OE bolts or ARP studs for performance/insurance
• Fluids & Filters: fresh coolant and engine oil/filter after repair

What’s In The Box

• (1) Genuine Cummins 4089819 upper gasket kit containing: cylinder head gasket (standard configuration), valve stem seals, injector sealing washers, valve cover gasket, intake/exhaust manifold gaskets, turbo gasket, rocker lever housing gasket, thermostat/oil drain seals, and application-specific O-rings/lock plates for a complete top-end reseal.

Installation Tips

• Verify head flatness and measure piston protrusion to confirm head gasket selection if applicable.
• Clean deck and head surfaces thoroughly; avoid abrasive media that can embed.
• Follow factory torque sequence/angles; replace TTY bolts or upgrade to studs.
• Bleed cooling system and recheck for leaks after heat cycle; retorque where OEM procedure specifies.

FAQ

WILL THIS KIT FIT MY 2003–2007 5.9L CUMMINS RAM?

Yes—4089819 is designed for HPCR ISB 5.9L (2003–2007 Ram 2500/3500). Always confirm by VIN/ESN.

IS THE HEAD GASKET STANDARD THICKNESS?

Yes—this kit is the standard-thickness configuration. Verify piston protrusion/ESN if your build requires a different thickness.

DOES THIS INCLUDE INJECTOR SEALS AND MANIFOLD GASKETS?

Yes—the kit includes injector sealing washers plus intake and exhaust manifold gaskets along with other top-end seals and O-rings.

WHAT LOWER-END SEALS DO I NEED?

Pair this with the 4089173 lower engine gasket kit if you’re doing a full reseal from pan up.

IS THIS A GENUINE CUMMINS KIT?

Yes—OE Cummins 4089819 for proper fit and durability.