I have been thinking about getting some hurricanes in place of my crappy 4-2-1 header on my n14 currently, as they constantly leak at the 4-2 join and i have no idea what company made them(Chinese probably). I have noticed that hurricane have made a 4-1 design header which i have read that they should increase top end which in my case, would be a benefit because i will be installing cams in the near future. The 4-2-1 design brings more mid to top and maybe more low but would like to know someone's experience with the headers preferably the 4-1 header and would they be worth the extra $200. If you can include specs and dyno sheets that'd be awesome. Cheers.