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3923331 | Cummins 4B/6B Thermostat Seal

Pricing: $2.40

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When it comes to Thermostat Seals, why risk your engine?

Don?t let a small part turn into a major repair. We wouldn't risk putting sub-par parts into our engines, so why should you?

HHP only sells Thermostat Seals that are manufactured in a state of the art facility using top of the line machining and measuring equipment to ensure each part is manufactured to OEM specifications. Combine this with up to 50% off OEM prices, an industry leading 2-year warranty and technical expertise from HHP?s certified staff, and you?ve got a quality Thermostat Seal that will keep you running for another million miles.

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

  • Get the perfect seal with a brand new one that's built to OEM specifications.
  • Each seal is manufactured and assembled in an ISO 9001: 2008 certified facility, ensuring quality and consistency.
  • On top of that, you'll get equal or better quality compared to the OE at a much lower price.


  • (1) Thermostat Seal


2-Year Parts and Labor Warranty

OEM Applications

  • 3923331
  • CUM3923331
  • 3920020
  • 3903301


Technical Data

For B-Series 2-Valve


  • P022483
  • P022483
  • IMB
  • New


Shipping Information

  • Item Requires Shipping
  • 0.0 lbs.
  • W3.0000” x H0.2500” x L4.0000”

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