The best Transmission Filter

Hi there
I was serching the web for the best filter but got to none, this search because I bought a Pro-King which I havent installed yet and I dont know what to tell but semm to be cheap and I dont like or want to kill my tranny because of saving a few bucks. (I've always use original or Fram :smile: )

I would like to know more about Pro-King and what other filters are good.