my shaft is too long. take a look at it

I never had that problem in my life but I have it now.................................... My Mopar performance oil filters came in today for this /6 and it wouldn't go on. I thought at first the hole in the filter was too small. went back out to the garage and measured and the shaft is too long and the filter is bottoming out. Bout 1/2 " too long. There was a long filter on there but I want this filter on it. So, can I cut 1/2" off the length of the shaft or do they make a shorter adapter for the short filters. This one screws out. I would prefer to get another adapter just in case I wanted to go with a longer filter later. So what is this thing called. does anybody have an idea where to get one. I am learning. Thanks,Bill