I noticed on my last throttle body cleaning that the German-made OEM throttle body I have has a back-bevel on the butterfly but the Canadian-made OEM one that came on the truck from the factory does not.
Anyone else notice this bevel? I remember reading somewhere that people were modifying original TB's in this way? I bought the German one from the dealership 6 or 7 years ago and it has a Chrysler emblem on it.
Have not noticed any difference in performance between the two? Have always had exceptional throttle response due to keeping my exhaust original other than the Y-pipe.
The picture of the dirty TB is about 30k on the German model and another picture of the clean side. I have the Canadian original on the truck right now; hence the hard-to-get picture.
Very curious if anyone has a factory-installed German TB. Have swapped them back and forth while cleaning one a few times and never noticed that before!
What does that bevel improve, if anything?

Thanks,