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4955595 | Cummins ISX/QSX Upper Engine Gasket Set, New

Pricing: $514.19

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These aren't your grandpa's gaskets.

A blown gasket can be anything from a minor annoyance to leaving you stranded on the side of the road. You don't have to put up with whatever gasket you can get your hands on; our gaskets are engineered to withstand anything you throw at it and last well into another million miles. No doubt about it, these are some of the best gaskets (sets) on the market.

It's no secret that diesel engine parts can cost an arm and a leg. That's where HHP’steps in. We offer premium aftermarket gaskets (sets) at up to 50% off OEM prices. While most believe aftermarket retailers sell cheap gaskets with zero warranty, packed in a dusty box from who knows where, HHP is here to kick that stereotype to the curb. HHP provides Gaskets fabricated for unstoppable performance and a 2-year warranty. How's that for an aftermarket part?

Need a little extra proof? Let's talk shop.

  • You'll get quality knowing each brand new upper gasket set is manufactured and assembled in an ISO 9001: 2008 certified facility.
  • Why pay extra when you can get a gasket set made to OE specifications with equal or better quality, at a much lower price.
  • You can count on the correct materials in your gasket set, giving each component excellent performance in functionality and sealability.
  • To top it off, our proper material selection is based upon pressure and temperature variations, also contact with many fluids and surfaces to give your engine optimal performance.
  • We also make sure our USA made sealing products use 100% asbestos-free material. It doesn't get better than that!


  • (1) Upper Engine Gasket Set
    • (1) O-Ring Seal
    • (1) O-Ring Seal
    • (1) O-Ring Seal
    • (1) Electronic Control Module
    • (1) Thermostat Housing Cover Gasket
    • (1) Thermostat Housing Gasket
    • (1) Turbocharger Gasket
    • (8) Cavity Plugs
    • (1) Camshaft Cover Seal
    • (1) Camshaft Cover Seal
    • (6) O-Ring Seals
    • (1) Exhaust Manifold Gasket
    • (4) Exhaust Manifold Gaskets
    • (1) Exhaust Manifold Gasket
    • (1) Rectangular Strip Seal
    • (1) Fuel Control Housing Gasket
    • (6) O-Ring Seals
    • (6) O-Ring Seals
    • (6) O-Ring Seals
    • (1) Cylinder Head ISX Gasket
    • (1) Flange Gasket
    • (6) O-Ring Seals
    • (6) Injector O-Ring Seals
    • (1) Grommet Seal
    • (1) Connection Gasket
    • (1) Camshaft Cover Gasket
    • (1) Camshaft Cover Gasket


2-Year Parts and Labor Warranty
OEM Applications:
  • 4025300
  • 4352144
  • 4955595

Technical Data

Upper Gasket Set Non-EGR Engines

Year: 2010-2015
Liter: 11.9
CID: 726
Cylinder: L 6
Bore/Stroke:5.1181-5.1196", 5.9055"
Compression Ratio: -
Firing Order:1-5-3-6-2-4

Tune-Up Specifications:
Oil Pressure At Idle: 13.0 PSI MIN
Intake Valve Lash: .014"
Exhaust Valve Lash: .032"Cold

Year: 1997-2010
Liter: 15.0
CID: 912
Cylinder: L 6
Bore/Stroke:5.3937-5.4000", 6.653"
Compression Ratio:18.0 :1
Firing Order: 1-5-3-6-2-4

Tune-Up Specifications:
Idle Speed (rpm): 700-800
Oil Pressure at Idle: 20 PSI @ IDLE 200º F
Intake Valve Lash:.014" COLD
Exhaust Valve Lash:.027" COLD

Signs that you should replace your gaskets include engine overheating and thick, white steam.



Shipping Information

  • Item Requires Shipping
  • 12.0 lbs.
  • W13.0000” x H2.2500” x L42.0000”

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