[Singleton]

Originally Posted by Scott Stoneburg

Pretty sure Mr Gasket still offers them, just not cheap

The problem with the Mr Gasket 987G 2-degree cam key is that it changes the crank degrees by 4. So if you're wanting to advance or retard the cam 2 degrees, you would need a 1 degree offset cam key, which, as far as I know, no one makes anymore since the Mopar keys are out of production.
The Mr Gasket 988G 4-degree key will change crank degrees by 8

[Formulas]

https://s1partscenter.com/brands/cummins/key/3944039

from the pictures and what little specs i can find .. this key seems to have minimal offset

some mercedes engines have the same dimensions but with a large offset

in the past i have measured my mopar key set and it seems that every step in offset is around .010 of step increase

[TedRamAirII]

I'm talking about CAM Timing, not ignition Timing.

[Skip Fix]

My machinist hand made one with a file to get it right on one motor he assembled for me. I usually am maybe 1 degree off using the Mopar ones. Have yet to find a chain right on dot to dot.