I have a set of 240's mani's on the roadster. He was first to tweak the stock intakes. Rob later refined 240's design, making them look stock by having a better design and weld. Both cars have better low end than stock. Like anything you add, you must adjust your tune to get the most out of them. Rob other intakes are much larger by design, and don't look stock at all. But do perform better than the tweaked set. Again, a tune is necessary. That is all I have add. Good luck with your modding.