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3412277 | Cummins ISX/QSX Dual Cam Loaded Cylinder Head, Remanufactured

Pricing: $3,132.55

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Refundable Core Charge: $600.00
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Is your Cylinder Head in it for the long haul?

We all know in order to get a million of miles out of your engine you need to keep your engine cool, well lubricated, and perform regular maintenance. Let one of these slip... and your rig is going to wind up in the shop with you stuck waiting for the repair.

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 parts at up to 50% off OEM prices. While most believe aftermarket retailers sell cheap parts with zero warranty, packed in a beat-up box from who knows where, HHP is here to kick that stereotype to the curb. HHP provides Cylinder Heads with additional engine cooling properties and a 1-Year Warranty. How’s that for an aftermarket part?

Need a little extra proof? Let's talk Cylinder Heads.

  • You will not regret buying our remanufactured Cummins ISX/QSX 24 Valve Cylinder Head which has all new valves, guides, springs, seats, seals, cups and camshaft bearings.
  • The remanufacturing process ensures it will arrive in excellent condition, the same condition it was when it rolled off of the assembly line. Ensuring you have the best quality.
  • To keep your engine strong, our remanufacturing process includes magnafluxing to detect cracks, and any cracked heads are furnace welded. Any under lower limit heads are thermal cast for long lasting strength and durability.
  • To top it off, our reman cylinder head is 100% air decay and wet tasted, threads are chased, and finished machined.
  • Keep your engine running at peak performance, with a hand reassembled head thoroughly checked to ensure like new fit and finish.
  • We have ASE certified techs on staff to answer all of your technical questions. You'll be back up and running in no time.


  • (1) Cylinder Head (including all new valves, guides, springs, seats, seals, cups & camshaft bearings)


1-Year Warranty on parts, with the first 6-months covering both parts and labor.

OEM Applications:

  • 4331387
  • 4026626
  • 4059225
  • 4059238
  • 4059432
  • 4101455
  • 4026793
  • 4331387RX
  • 5413782
  • 4026542
  • 3680872
  • 3680855
  • 3683002
  • 3683986
  • 3682863
  • 5413782RX
  • 4962732
  • 3412277
  • 4101420
  • 3682836
  • 3412280
  • 4059264
  • 4926774

Technical Data

Fits Applications:
Cummins ISX/QSX Dual Cam

Cummins ISX Engine Specifications:
Year: 1997-2010
Liter: 15.0
Cyl: L6
Bore: 5.3937-5.4000" (137.000-137.016mm)
Stroke: 6.653" (139.000mm)
Compression Ratio: 18.0 :1
Firing Order: 1-5-3-6-2-4

Cummins QSX Engine Specifications:
Year: 1997-2016
Liter: 15.0
CID: 912
Cylinders: L 6
Bore/Stroke: 5.3937-5.4000" 6.653"
Compression Ratio: 18.0 :1
Firing Order: 1-5-3-6-2-4

New Thickness: 8.875" from Deck Valve to Cover Rail
Minimum Thickness: 8.8470-8.8600"

OHC Bore Diameter:
Small Bore: 2.7555-2.7565"
Large Bore: 3.5425-3.5435"

Intake Valve Lash: .014" COLD (.356mm)
Exhaust Valve Lash: .027" COLD (.686mm)
Cyl Head Torque: 148,300 FT/LBS, +90°

Installation Tips:
Make sure to check the condition of your cylinder head before installing cylinder liners. Cylinder Heads in imperfect condition may lead to cylinder liner damage.


Shipping Information

  • Item Requires Shipping
  • 517.0 lbs.
  • W16.5000” x H13.0000” x L45.0000”
  • Free Shipping!

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