Check out the 2nd to last post by Motorking.
https://bobistheoilguy.com/forums/ubbthreads.php/topics/3322852/Re:_Fram_High-Performance_oil_#Post3322852
Here is the quote
Originally Posted By: Motorking
Hi,
I work for FRAM. The HP filter is identical to the filter we used to make for K+N before they sourced production to Korea. of course, it doesnt have the nut on the end. It has a very thick tapping plate, 500psi burst strength, 94% efficiency, stainless screen over the bypass valve. Super heavy duty and great for performance cars/trucks and off roading. That said, both TG and Ultra are better ate removing dirt from your oil.