















Alt ST-177, fits for 3126 CAT. ( NOT for CAT 3126B C7 C9.)
Used with AM-310-7255, AM-310-7257, AM-8C-0563, AM-227-2911.
Comes with an o-ring, it is easy to install the sleeve cup without any damage.

Alt ST-179B, fits for 7.3L Powerstroke CAT 3126 3126B C7 C9.
Used with cups 227-2911, 227-1200, & F4TZ-9F538-A.
EM501611 Premium 1-11-1/2 Dia 4 Flute HSS Bright Taper Pipe Tap is used for injector cup removal. (Tap is considered wear item/no return after use. Easy to get it at the local store.)

Fits for C7 3126 3126B Injector Cups 227-1200 & 227-2911.
Insert an Injector Cup Plug into your old injector cup.
Used to plug the bottom of injector cups when tapping them.
This will prevent metal shavings from entering your engine.


This will NOT work on engines with mechanical injection MEUI. If your injectors are actuated by a rocker arm and push rod you have a MEUI and need tools 143-2099-MUI-R & 143-2099-MUI-I instead.
This tool works on 3126 (Not 3126B) engines with electronic fuel injection HEUI. If you are working on a 3126B or C7 you will need ST-S916 instead.




