Thank You to the members who have made me aware of this post and allowed me the opportunity to reply & update.
Unfortunately, I have been a 1 man shop for a while, technically, I have a local farmer that helps me 8-9 hours a week...maybe. This has been a strain on the business and a number of products have come to a standstill or close to it due to the lack of manpower. This also causes me to forget things, like updating the website and misc little things.
Now that I am done making excuses, here is the train of thought on the Track Boss oil filter adapter.
Originally, the adapter was made with 1 size ID, and machined with the large end away from the chuck. This was easy for broaching, but a little difficult for threading the 2 different sizes, since the smaller OD was then on the back side of the larger filter thread.
Almost a year ago, we had the idea of tapering the ID to allow more flow (less resistance) and machined the adapter with the larger OD near the chuck making threading much easier. This did require us to broach deeper so the hex is more "accessible" So in the big picture, these changes were supposed to be an improvement.
Why use it??? With about 1,000 sales, the feedback I am getting is, customers are saying a 10-%15 increase in "net" oil pressure through the entire RPM range. Keep in mind, the oiling system is a system of leaks with bends & resistance. The 51268 oil filer does not so much increase oil pressure, as so much has less resistance, and therefore nets an increase in pressure. The oil filter is the 1st resistance oil leaving the oil pump will see, so any help in this area helps the entire system.