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3901969 | Cummins C-Series Block Expansion Plug

Pricing: $3.31

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When it comes to Block Expansion Plugs, 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 Block Expansion Plugs 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 Block Expansion Plug that will keep you running for another million miles.

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

  • This small part is a critical component of your engine block so don't let misfitting parts have you worried. You'll get a expansion plug from HHP that's built to OEM specifications to fit your engine just right!
  • Also, each plug is manufactured and assembled in an ISO 9001: 2008 certified facility, ensuring you'll get quality you can count on!
  • Parts from the OEM can be expensive, so don't overpay for a plug when you can get equal or better quality at a much lower price with HHP.


  • (1) Block Expansion Plug


2-Year Parts and Labor Warranty
OEM Applications:
  • 3901969
  • CUM3901969

Technical Data

Rear Cam Bore



Shipping Information

  • Item Requires Shipping
  • 0.1 lbs.
  • W3.0000” x H1.0000” x L4.0000”

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