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4955356 | Cummins B-Series Upper Gasket Set

Pricing: $200.51

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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 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 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 Parts and Labor Warranty. How?s that for an aftermarket part?

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

  • We value quality. That is why this brand new gasket set is manufactured in an ISO 9001: 2008 certified facility, ensuring excellent quality and consistency.
  • Also, you will have more cash in your wallet because you'll get quality that meets or exceeds the OE's at a much lower price.
  • Plus, proper materials are used in the crafting of the gaskets to give increased performance in functionality and sealability.
  • No doubt these gaskets are premium because they are USA made and they use 100% Asbestos-Free Material. You can't beat that!
  • Want peace of mind? HHP has you covered! These gaskets are crafted to strict OE specifications giving you proper fit and function.


  • (1) Upper Gasket Set
    • (1) O-Ring Seal
    • (1) Turbocharger Gasket
    • (1) Oil Drain Gasket
    • (1) Cover Plate Gasket
    • (4) Exhaust Manifold Gaskets
    • (1) Thermostat Seal
    • (1) Sealing Washer
    • (10) Sealing Washers
    • (4) Injector Seals
    • (4) O-Ring Seals
    • (4) O-Ring Seals
    • (1) O-Ring Turbo Seal
    • (5) Sealing Washers
    • (1) O-Ring Seal
    • (1) Exhaust Outlet Gasket
    • (1) O-Ring Seal
    • (1) Valve Cover Gasket
    • (1) Rocker Lever Housing Gasket
    • (1) Cylinder Head Gasket
    • (1) Sealing Washer
    • (1) Turbocharger Gasket
    • (1) O-Ring Seal
    • (2) Sealing Washers
    • (1) Rectangular Ring Seal
    • (1) Seal
    • (2) O-Ring Seals


2-Year Parts and Labor Warranty

OEM Applications

  • 4955356

Technical Data

4.5L RGT
Fits Applications:
ISB/QSB 4-Valve

Cummins B-Series Engine Specifications:
Liter: 3.9
CID: 239
Cylinders: L 4
Bore/Stroke: 4.0157-4.0173" (101.999-102.039 MM)4.724" (119.990 MM)
Compression Ratio: 16.3:1 RATIO
Firing Order: 1-3-4-2

Tune-Up Specifications:
Oil Pressure At Idle: 30 PSI @ 1300RPM
Oil Pressure: -
Intake Valve Lash: .010" COLD
Exhaust Valve Lash: .025" COLD (.635 MM)

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


  • P023520
  • P023520
  • IMB
  • New


Shipping Information

  • Item Requires Shipping
  • 3.5 lbs.
  • W9.7500” x H1.7500” x L34.5000”

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