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3906209 | Cummins 4B/6B .5mm Piston

Pricing: $44.51

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Think you know the truth about Pistons? We'd bet you'd be surprised.

It?s no secret, rebuilding your rig is one of the most labor (and wallet) intensive repairs out there. Sure, you want your engine to last another million miles but you also want the best price; so what should you choose- OEM or Aftermarket?

When it comes to engine parts, the aftermarket often gets a bad rep. The idea that aftermarket retailers sell cheap parts with zero warranty, delivered in a beat-up box written in another language couldn?t be further from the truth. HHP is here to set the record straight; we only sell new Pistons. On top of only offering premium quality parts, we also make sure you save up to 50% off OEM prices. So, when it comes to your Piston, what?s left to want?

Need a little extra proof? Let?s talk Pistons.

  • You don't have to sacrifice quality for a lower price. At HHP you'll get equal or better quality compared to the OE at a much lower price!
  • You can rest assured your engine will have proper fitment because each piston is made to OEM specifications.
  • We ensure you'll get a quality made piston to help you go a million more miles because each one is manufactured and assembled in an ISO 9001: 2008 certified facility.


  • (1) .5mm Piston


2-Year Parts and Labor Warranty

OEM Applications:

  • 3906209
  • CUM3906209
  • 3802062

Technical Data

For Model 4B - 4 are Required
For Model 6B - 6 are Required


  • P022539
  • P022539
  • HHP
  • New

Shipping Information

  • Item Requires Shipping
  • 4.0 lbs.
  • W5.5000” x H5.5000” x L6.0000”

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