SKU: 41722723880

Industrial Injection Premium Stock Plus Cylinder Head 12-Valve With Fire Ring Groove 89-98 Ram 5.9L Cummins

Sale price$844.63 Regular price$938.48
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

Industrial Injection Premium Stock Plus Cylinder Head 12-Valve With Fire Ring Groove 89-98 Ram 5.9L CumminsThinking about upgrading to Fire Rings in your 12 Valve Cummins? Radius cut fire ring grooves create a stronger, more reliable combustion seal, allowing a 12 Valve Cummins engine to handle higher boost and cylinder pressure without head gasket failure. If you are planning on pushing your Cummins power to the limit, ensure your engine can withstand the extra stress that higher performing injectors and fuel systems can impose with a cylinder head

Thinking about upgrading to Fire Rings in your 12-Valve Cummins? Radius-cut fire ring grooves create a stronger, more reliable combustion seal, allowing a 12-Valve Cummins engine to handle higher boost and cylinder pressure without head gasket failure. If you are planning on pushing your Cummins power to the limit, ensure your engine can withstand the extra stress that higher-performing injectors and fuel systems can impose with a cylinder head designed to handle it. Get an affordable and reliable upgraded head with Industrial Injection's Premium Stock Plus Cylinder Head.

NOTE: Fire Ring Head Gasket Sold Separately. Installation of a fire ring gasket requires high yield head studs to ensure proper seat of the head to the cylinder block.

Precision Remanufacturing Process for Cylinder Heads

Every remanufactured cylinder head undergoes a detailed cleaning, inspection, and machining process to ensure it meets strict quality standards for diesel engine performance, durability, and reliability. This comprehensive remanufacturing process helps restore the strength and efficiency expected from a Cummins diesel engine.

Thorough Cleaning & Inspection

Each cylinder head begins with a deep cleaning process to remove contaminants and prepare the casting for inspection and machining.

  • High-pressure jet washing removes oil, grease, and debris
  • Glass bead blasting eliminates carbon buildup from the casting
  • Magnaflux inspection (for cast iron heads) detects hidden cracks
  • Pressure testing verifies structural integrity
  • Visual inspection ensures the casting is free of defects

Valve guides and valve seats are removed as needed to prepare the cylinder head for machining or port work.

Upgraded Heat-Treated Valve Guides

New high-strength alloy valve guides are installed to improve durability and longevity in demanding diesel engine environments. These guides are heat treated to Rockwell 22 “C” scale, delivering exceptional wear resistance that exceeds many factory materials, including bronze.

Each valve guide also features a precision spiral groove designed to retain oil and improve valve stem lubrication during engine operation.

Precision Diamond Honed Valve Guides

Instead of traditional reaming, the valve guides are precision honed using diamond abrasives. Diamond honing ensures consistent accuracy across every cylinder head.

This process provides:

  • Exact valve guide sizing
  • Consistent bore geometry
  • Smooth internal surface finish
  • Improved valve alignment and longevity

Each guide is verified using a valve guide bore gauge to ensure proper tolerances.

Multi-Angle Performance Valve Job

To improve airflow and combustion efficiency, the cylinder head receives a precision multi-angle valve job using a Serdi 100 guide and seat machine.

The Serdi system uses a solid carbide straight shank pilot inserted into the valve guide to simulate the valve stem during machining. This process ensures perfect alignment between the valve seat and valve face, creating an optimal seal and maximizing airflow in and out of the cylinder head.

Precision Cylinder Head Surfacing

Each cylinder head is resurfaced using CBN or diamond tooling on a Berco milling machine. This machining process restores a perfectly flat sealing surface and allows technicians to control the finish based on the head gasket being used.

For example, MLS (Multi-Layer Steel) head gaskets require an extremely smooth surface finish to ensure proper sealing in high-pressure diesel engines.

Final Assembly

Once all machining processes are complete, the cylinder head is:

  • Jet washed again for final cleaning
  • Thoroughly dried
  • Assembled with new valve seals
  • Equipped with new performance valve springs

The result is a high-quality remanufactured diesel cylinder head built for dependable performance in demanding Cummins engine applications.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 41722723880

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My dog loves her Nubbies! My Dog chews her Nubbie every morning after she has her breakfast. She sometimes wants my husband or I to hold it for her while she chews on it. I think it is really good for her teeth and gums. These last a few months for our dog who chews it every morning. After a few months the edges get a little rough from all the chewing so I throw it out and replace with a new one. These are very reasonably priced, so I always have a fresh one ready to go. She gets very excited when we get a new one out of the package..
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Reviewed in the United States on September 5, 2025
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Amazon Customer
Fort Morgan, US
★★★★★ 5
Great chew toy!!!
Size: 4 Inch (Pack of 2)
My dachshunds love all the bam bones!!!
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Kaylon Jenkins
Massapequa, US
★★★★★ 5
Great for frenchies
Size: 4 Inch (Pack of 2)
My pups love these and they look just like the photo when playing lol
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Reviewed in the United States on June 1, 2026
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Jess
Natrona Heights, US
★★★★★ 4
Pups like them
Size: 4 Inch (Pack of 2)
It took a little bit but once my dogs started chewing on them they seem to like them. They're holding up pretty well and not destroying them too quickly like they did some other chews.
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adiva33
Lexington, US
★★★★★ 5
This chew will do
Size: 4 Inch (Pack of 1)
My Maltipoo loves this chew toy. It’s a good size for her biting and can carry it if needed.
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Reviewed in the United States on May 28, 2026

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