The 557 is about 251 @ .050 if I recall so only about 3 degrees bigger in duration, not that the increase in lift doesn't help too. If you are going to make the effort for a cam change, I would think you might want something a tad bigger. I have heard mixed reviews on the Team G and that some had some core shift. That might be an easy change if you could snag a used intake.
That's why I asked him about what Team G. I have read the Team G dominator was a very good intake not so much for the 4150.
