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 17 - Jul 22

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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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4.0 ★★★★★
Based on 28 reviews
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Verified Purchase
Tricia R
Charlottesville, US
★★★★★ 5
My first experience using one of these, it worked VERY well!
Size: 01- 24pcs (Classic Green)
Our tire picked up a large bolt that we could hear clicking when we were driving, and our low pressure warning light lit on our dash. Yep---tire was 7 psi below recommended (32 down to 25), I could not see the leak site and we were far from home so I drove some more then checked again. Just one more psi down over those 20 miles so all the way home (100 miles more) we drove. By that time I was able to find the leaking spot and see the bolt head had ground off or broken off. It was just a very slow leak, a few psi more per day, but I knew it would only get worse. I decided to order this kit after reading reviews & don't believe the haters. It worked so well for me it is worthy of my time to write of my experience. The tools to me all seem robust & top notch, especially for the price. There are multiple straps inside the nice case to secure them in place. YES---you have to use your own pliers but come on---don't ding the product when that is spelled out clearly in the description! So---I had the huge benefit of allowing a full day in my own garage to do this. I pulled the wheel since others had said it much easier that way. I then used my pliers to pull the remaining bolt out of the tire and immediately heard the air rush out. "That's a pretty big hole!" I thought. I reamed the hole easily, lubed the plug installation tool, centered one plug strip in the tool and pushed it in all the way except about 1" left outside the tire. I aired up the tire after about 5 minutes of what I thought would be "cure time" but don't know if that's necessary. After my initial inflation to full pressure the tire actually did leak down a bit over a few hours. A few cycles of this and it has stayed sealed completely ever since....not even down a pound! I assume this was the time the vulcanizing compound (already applied to the plugs) took to seal to the tire....maybe if I had driven on it right away (heat generated and varying forces) it would not have leaked out. My initial fear of "huge hole" and assuming I might need to plug twice or use 2 plugs the fear was unfounded. I will update this post if something goes awry. For now I am one happy customer as well as a happy camper. I'd strongly recommend this kit based on my experience, plus I have the remaining patches & tools if needed again. I hope this helps you with your decision/choice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 27, 2024
P
Verified Purchase
Pedro Guimaraes
Natrona Heights, US
★★★★★ 5
Lifesaver Tire Repair Kit Every Car Should Have One
Size: 01- 24pcs (Classic Green)
This 24-piece tire repair kit has already saved me and my family multiple times. My car literally can’t go without it now. It’s compact, well-organized, and the tools are sturdy and professional-grade. Having this kit has saved us from costly trips to the tire shop, time wasted going back and forth, borrowing another car, or risking driving on a flat tire. Seriously, everyone should have one in their car, just buy it and keep it there. Trust me, it’s a game-changer!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2026
H
Verified Purchase
Holly A DeNomme
West Palm Beach, US
★★★★★ 4
Had no issue and it was very easy to use. It has been a week and no leak.
Size: 01- 24pcs (Classic Green)
Easy to use and its been a week and no leak. The kit is great and easy to use. The hard part was for me to get the screw out of my tire because the head was half gone. Once I got the screw out I followed the instructions and reamed the hole and inserted the plug and trimmed the plug. If you plan on keeping it in your car you probably should add a screwdriver and/or pliers to get the screw out of the tire and a razor to trim the plug once it is in. You really need a razor to trim the plug I tried with a knife but the had to get a razor.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2025
A
Verified Purchase
Amazon Customer
Birmingham, US
★★★★★ 5
Great Item
Size: 01- 24pcs (Classic Green)
Nice kit. Has athe tools and pieces for many easy repairs. Fits neatly inside durable case.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
G
Verified Purchase
Gary Pase
Massapequa, US
★★★★★ 5
Quality product
Size: 07- 22pcs (Blue)
Great kit for the price. Reamer and plug tool are strong and durable. Removable handles makes it great for broken tool or putting reamer on a drill if your lazy like me. Easy to use, easy to store and quality plugs
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 30, 2025

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