This puller is designed for an Audi S4 supercharger which has a pulley diameter of 63mm but the beauty of this puller is it made to fit pulleys down to 57mm.
The S4 pulley is 7 ribs and the Jags is 8 but it fits perfectly outside of the 1 rib.
Unfortunately I haven't received my new pulley to do the swap. I'm going with a 58mm pulley that supposedly needs no snout grinding.




Mounting holes slotted for different pulley sizes

 

How did this work out for you?

 

Perfect. I posted a video in the Ftype section. I installed a 58mm upper pulley.