92/93 fins go all the way down.

And 94/95 go halfway (making a thicker case wall).

If it makes it any easier to swallow, the last three posts (including this one) were made by the 3 top Supercharger experts on this Forum. Or at least 3 of the top 5.

Better yet, I'm sorry to go off the deep end in attempting to get you to understand which supercharger is which... can you take a picture of what is on your car.

I'm very interested to actually see the supercharger/throttle body on the actual car right now.

Will and everyone else is correct, the one I have is 1992/1993 and is the correct supercharger for mine. I asked the dealership on which supercharger is on my car and they said it is from a 1995 Ultra but was a 1993 series 1 engine in the Utlra. Thank you for showing great pictures and explaining all the details between the 2 superchargers.