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4089979 | Cummins ISC/QSC Lower Gasket Set

Pricing: $198.36

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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 warranty. How?s that for an aftermarket part?

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

  • Boost your engine to maximum performance with gaskets made from properly selected materials based on pressure, temperature variations and contact with many fluids and surfaces.
  • Using correct materials ensures your gasket set will have excellent performance, functionality and sealability. That means leak-free durability you can depend on. You can't beat that!
  • Plus, these gaskets utilize USA made sealing products with 100% Asbestos-Free material and are built to OEM specifications.
  • Trust the experts at HHP with a gasket set manufactured and assembled in an ISO 9001:2008 certified facility. You'll get equal or better quality compared to the OE at a much lower price.
  • Simply put, you can count on our gaskets to save you money and keep your engine going a million more miles.


  • (1) Lower Engine Gasket Set
    • (1) Breather Mounting Seal
    • (1) O-Ring Seal
    • (1) Oil Cooler Cover Gasket
    • (1) O-Ring Seal
    • (1) Oil Pan Gasket
    • (1) Accessory Drive Cover Gasket
    • (1) Oil Pickup Tube Gasket
    • (1) Rear Flywheel Housing Cover Gasket
    • (1) Water Pump Seal
    • (1) Water Inlet Connection Gasket
    • (3) Sealing Washers
    • (1) O-Ring Seal
    • (13) Sealing Washers
    • (4) O-Ring Seals
    • (2) O-Ring Seals
    • (1) Crankshaft Seal Kit
      • (1) Seal Installation Tool
      • (1) Oil Seal
      • (1) Oil Seal
      • (1) Seal Carrier
    • (1) Rear Crankshaft Seal Kit
      • (1) Seal Installation Tool
      • (1) Oil Seal
      • (1) Seal Installation Tool
      • (1) Seal Installation Tool
    • (1) Fuel Pump Gasket
    • (1) O-Ring Seal
    • (1) O-Ring Seal
    • (6) Liner Seals
    • (1) O-Ring Seal
    • (1) Oil Cooler Core Gasket
    • (1) Copper Gasket
    • (1) Threaded Plug


2-Year Parts and Labor Warranty

OEM Applications:

  • 4089979

Technical Data

Fits Applications:

Cummins QSC Engine Specifications:
Year: 1998-2016
Liter: 8.3
CID: 505
Cylinders: L 6
Bore/Stroke: 4.4897", 5.315"
Compression Ratio: -
Firing Order: 1-5-3-6-2-4
Comments: 24 Valve Head

Tune-Up Specifications:
Oil Pressure at Idle: 10 Psi Min
Oil Pressure: -
Intake Valve Lash: .006-.022"
Exhaust Valve Lash: .015-.032"

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


  • P023323
  • P023323
  • HHP
  • New


Shipping Information

  • Item Requires Shipping
  • 3.0 lbs.
  • W15.0000” x H1.7500” x L25.2500”

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