Sorry, you triggered my peave-o-meter. Your Inline 4 cylinder engine only has one header. Not headers.....header. Now you can be relieved that you don't have to spend $700, you only have to spend $350. As for the question at hand. Go with the 4-2-1. Thats what I have and the gains throughout the entire rpm band are more noticeable then what you would see from the 4-1. 2 piece design just makes it easier to install, the differences between the 2 are negligible, so go for what they have available for your car. Good luck!
