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
Save 10%

Pay in installments of $234.62 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 21 - Jul 26

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.1 ★★★★★
Based on 27 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
O
Verified Purchase
Odette Ponsa Luna
Omaha, US
★★★★★ 5
De muy buena calidad y elegancia
Size: 4T, Color: Red
Bello espectacular. Mi hijo lo usa cada vez que tiene un evento y siempre se ve hermoso. Su calidad es muy buena y viene con todo los accesorios. Es muy elegante
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
L
Verified Purchase
Lula
Phoenix, US
★★★★★ 5
GET IT FOR YOUR SONN!!! ❤️
Size: 7 Years, Color: Sky Blue, Size: 7 Years, Color: Sky Blue
this suit is EVERYTHING!!! I can't believe we got it for this low!!! My son usually wears an 8, he's 6yo. the size 6 was snug, size 7 was perfect size 8 was still nice but a lil big. get it! Here the vid of the blue size 7. we just tried it on so didn't put on all the other pieces. the pink size 6 and the pink size 8 and a pink 2t wait it won't let me post multiple videos. darn.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2025
A
Verified Purchase
Amazon Customer
San Leandro, US
★★★★★ 1
Sizing is way wayyy off.
Size: 5T, Color: Beige
I ordered three of these in different sizes for my 5yro&7yro -They’re average to their age sized kids. So ordered size 5 for my 7 yro (I read other reviews on it being big). Everything fit except the pants we’re closer to a size 8 (I ordered a size 5 remember) so disappointed. And a size 4 for my 5yro. The size 4 pants fit my 7yro! But not my 5yro at all. The rest of size 4 outfit was only a little big but not big enough to trade up to the other child. Unfortunately the gigantic pants are beyond the problem. They are definitely running 3 sizes too big. They’re not even something I could fix with my sewing machine. Company says they’ll work with you & send one item “free”but then say their shipping & handling fees are more expensive than the suit. Feels like it’s a ploy. update, the third suit arrived after a month of waiting and its a size 3-well its supposed to be a size 3. The pants are the size of an 8 year old. Im pissed. it's now past the return date, I have 3 suits for $45 each, and I had to rig the pants to fit my 4yro for my wedding. looked like crap obviously bc an 8yro's pants don't fit a 4 yro.. Don't bother buying from this company unless you're buying for an absurdly proportioned person.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 12, 2023
E
Verified Purchase
emily
Fort Morgan, US
★★★★★ 5
Absolutely loved it
Size: 12 Years, Color: Black
My son looked awesome in this suit! True to size. Great value for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
K
Verified Purchase
kim cover
Grantham, US
★★★★★ 5
Great suit
Color: Light Grey (Stretch Fabric), Size: X-Small, Color: Light Grey (Stretch Fabric), Size: X-Small
My son wore on 2 different occasions. Very nice for the price. No one could believe what we paid for it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026

recommand products