This one specifically says diesels EXCEPT powerstroke....
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Check the vehicle fit. That looks like a starter for a gas engine.
Cubey, the one that shown is in your link is the long Mitsubishi style starter. Yes it is a gear reduction starter. All of the IDI starters were gear reduction starters except for the AC Delco starters that were used on the early 6.9s. Those were direct drive. The Nippendenso style starters like the Power Master are often the only ones called "gear reduction" starters even though it's incorrect.
And this 9050 is a "nippondenso style"?
I know that the Nippendenso starters spin the engine over faster than any of the others do. If you hear one in action, you'll be able to tell the difference. My guess is that the ND starters have a different gear reduction ratio and they don't need to draw as much power to spin faster. Whatever the reason, I know that I'm not going back to the Mitsubishi style starters on my trucks after having just one ND style. There's really that much difference.