I disagree. I don't think the stock pump is up for the task. It struggles with larger tires. When wheeling, it has a hard time with tires in ruts, etc. I personally wanted even more boost just in parking lots. When my pump failed, I put on a rebuilt one from Napa. It was a mistake. Like others have said, these pumps really aren't rebuildable (if you want to do it correctly). Needless to say, it didn't last. I then went Saginaw. Awesome upgrade. Way more boost making turning larger tires a breeze. In my opinion, Saginaw pumps are superior to the ones that Mr. T provided. And I did it the lazy way and just bought the bracket, so it basically was just a bolt on operation. YMMV.