Originally Posted by G.C
Wow that's news. They must of just started making those becuase over the years most people who have a greddy (which would be a better buy over the dc) or DC header would have an axhaust shop cut the collector and re-weld a 2.25 or 2.5" collector on to help with breathing when they do head work on the h22 to save money.
http://honda-tech.com/zerothread?id=218304
That's where I'm coming from. This dc header with a 2.5" collector is new.... (if you get it good luck with it but just keep in your mind whatever power you make you can make more a lot more.)
here is 18hp gained switching from dc to smsp
http://www.preludeonline.com/f60/h22...o-info-154398/
So I don't think I need to do any research because I already know that If I build a n/a h22 I'm not going to use a dc or megan or greddy or any other off the shelf header on my build becuase those header(s) are too restricted. Especially with the primaries, collector and there overall design. Well I guess not cause of collector sizes anymore since dc now offers a 2.5" collector that people have been doing for years.
Good luck with your build Bro!