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2864028 | Cummins ISM Cylinder Head, New

Pricing: $2,266.61

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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.

  • Want peace of mind? Replacing your old cylinder head is critical for cylinder functionality and surrounding components. Plus, with a new cylinder head your rig will be up and running for another million miles!
  • You'll get high quality with state of the art tooling and precision machining. Also, why overpay when you don't have to? You'll get equal or better quality compared to the OE at a much lower price!
  • Getting a new cylinder head will not only create excellent valve movement but increase air flow! You can't beat that!
  • To top it off, this head is assembled in the USA and is built to OEM specifications giving you proper fit and function.


  • (1) Cylinder Head (Includes Valve Guides, Seats, Injector Tubes, Valves, Springs, Seals, Caps, Keepers)


1-Year Warranty
First 6 Months Includes Labor

OEM Applications

  • 2864024
  • 3401520
  • 3401537
  • 4003991
  • 4004086
  • 3895860
  • 3417629
  • 2864028
  • 4083406
  • 3073514
  • 4952829
  • 4952453
  • 3088863


Technical Data

Cylinder Head Includes Valve Guides, Seats, Injector Tubes, Valves, Springs, Seals, Caps, Keepers

ISM Engine Specifications:
Year: 1999-2008
Liter: 11.0
CID: 659
Cylinders: L 6
Bore/Stroke: 4.9213-4.9250", 5.7870"
Compression Ratio: -
Firing Order: 1-5-3-6-2-4
Comments: ISM, ISME, QSM11 Engines

Tune-Up Specifications:
Intake Valve Lash: .014" Cold
Exhaust Valve Lash: .027" Cold

Cylinder Head Specifications:
New Thickness/Measured At: 3.9070-3.9470"
Minimum Thickness: 3.9070"
Warp Specifications: .008" Maximum
Injector Tip Protrusion: .090-.100"
Comments: Rocker Shaft Arrows Must Be Pointed Down To Maintain Oil Flow To The Rocker Levers.

Valve Information:
Installed Stem Height: Intake-3.911-3.921" Exhaust- 3.911-3.921"
Stem Diameter: Intake- .3772-.3793" Exhaust-.3772-.3793"
Recession: Intake- PRIOR TO 8/21/06: .030-.046" BOTH INT/EXH Exhaust-AFTER 8/21/06: .020-.036" BOTH INT/EXH

Valve Guide Information:
Guide Height: Intake-1.069-1.089"Exhaust-1.069-1.089"
Guide Clearance: Intake- .0014-.0045" Exhaust-.0014-.0045"

Valve Seat Information:
Seat Inside Diameter: Intake- 1.8079-1.8085" Exhaust-1.8079-1.8085"
Seat Insert Bore Depth: Intake-PRIOR TO 8/21/06: .370-.374 INT/EXHExhaust- AFTER 8/21/06: .360-.364 INT/EXH

Valve Spring Information:
Open Test Press: Intake- 281-356 LBS at 2.814" Exhaust- 281-356 LBS at 2.814"

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.


  • P258397
  • P258397
  • DCW
  • New

Shipping Information

  • Item Requires Shipping
  • 240.0 lbs.
  • W15.5000” x H10.0000” x L40.5000”

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