I have the regular Pac Brake on my 98 12 Valve and pull a 30' 5er and love the brake, I didn't know about Jelag when I bought mine, I would have bought from him if I'd known. The Pac Brake is awsum, works good with my auto trans. , had to change to the 60 LBs Valve springs, and the BD TC lockup, mine is not the PRXB but still works just great and you will love it, I use it all the time.