I don't know the difference, but can tell you that with all the problems with the stock TOB, I would NEVER consider replacing with one. That being said, I used a CF one that went bad after a few hundred miles. My NAPA one is doing fine and I've heard Mcleoud ones are fine. Don't know about the valeo. I know the NAPA and FRPP one looks identical but my napa one is quiet as can be...