Current Lead Times: In Stock Engines Ship Same or Next Day - Out of Stock: 1-3 Weeks on Most Long Block Engines; 3-5 Days on Heads – *call us for more exact lead times for your specific build 

12 Valve Cummins 1989-1998 Ram/Marine/Industrial Cylinder Head

SKU: CEP5912V2

This product is currently out of stock and unavailable.

This upgraded Cummins diesel engine cylinder head is a great choice for an improvement over stock.


Cummins 5.9 Remanufactured Cylinder Heads Include:

  • Resurfaced Cylinder Head To Meet Or Exceed OEM Specification of Ra or Roughness Average, which maximizes sealing surface performance.
  • New Valve Stem Seals
  • New Valves Seats
  • New Valve Guides
  • Threaded “Blow Proof” Plugs In the Top Of The Head.
  • Regrind Valves and inspect margins for proper sealing.
  • Cut seats with 3 angles and optimize flow.


Cleaning Process

Once the Cummins Diesel Engine cylinder head passes our rigorous inspection for cracks and imperfections through MPI testing, it will go through a stress relieving process in a furnace to turn any grease and oil into ash.
Then it will be shot blasted in our cabinet to remove any rust and scaling. This will also relax the material before machining to our specifications.

After this it will be checked for any broken bolts or studs, and removed.
Once the cylinder head has met our stringent standards, it will then start through the machining process.


Machining Process

Our Cummins heads are blueprinted to proprietary valve train geometry, to alter valve height and valve recession for maximum reliability and longevity. Our Valve stem heights are altered to remove preload on the lifter and decrease the wear and help the lifter live a long life.


Inspection Process

We pressure test the cylinder heads with 40 PSI pressure to make sure there are no leaks and then will again go through another extensive cleaning, quality control inspection and sign off sheet that will include all specs of the heads. We measure the following specs:

  • Valve recessions
  • Stem Heights
  • Installed Spring Heights
  • Spring Pressures
  • Keeper and Lock Positions
  • RA Recording by use of profilometer


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*Please choose the year first
*If you know your vin number before hand it is very helpful during the quotation period. Please note that this will be required before the engine is built.

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