Which one of those would fit the best for my b16a2 ??

 

It depends on what you are trying to do. A 4-1 header will give you more top end power, while a 4-2-1 header will give you more mid-range power. IMO if your car doesn't live at 7,000 RPMs then the 4-1 isn't necessary. If you want to spray nitrous, you definitely want to go with a SS header because the cermic headers will crack over time. Hope this helps you out.

 

i have a 4-1 ceramic header on my b16a of course i have a 8500 redline - my car pulls mad in top end...
what wierd is my friends SOHC del sol will pull on my from 110-114mph then after 115 its all over...