Cummins “250 Series” Applications

Posted by Rich on 12/22/21  ~  Posted in: News, Diesel Tooling Kits

We have received inquiries asking if we have Injector Sleeve Tooling for Cummings 855 Cylinder heads, another is 903, then there is the 1710, and more.

These are all under the same “250 Series” family of cylinder heads which all have a 5-1/2” bore.

A complete listing that uses the same Copper Injector Sleeves/Cups/Tubes & O-Ring are:

NH 230

NHC 250

NTC 250


SUPER 250/270

NT 270

NT 280

NTC 290

NT 310

NTC 335

NTC 350

NTC 400

NTA 370

NT 380

NTA 400

TNA 420

NT 855

V 903

VT 903

V-8 265

V 785, 927

VT 1710



The Irontite “250 Series” Sleeve Installation Kit Part Number is:  450-6152-50

NOTE: Sold separately, the Irontite "250 & L-10 Series" Sleeve Removal Tool is: 415-6132-50

Component items to complete your tooling needs are always available.

Please consider our “Field Tested” Injector Sleeve “Installation” Kits as more machinists are adding additional $$$ to the shop.

Irontite strives to bring you the most accurate and correct methods and tools to return engines to the factory OEM specifications. We feel that anything less is not adequate. Injector sleeve placement is critical to get proper Injector protrusion which provides the best Injector performance. That, in turn, saves on fuel and on engine wear and tear which means you get more mileage and longevity from your vehicle. Fewer trips to the fuel pump and less downtime means more money in the owner/operator's pocket.

When it needs to be done right, get it done with Irontite!