This is the only pic I can find. Secondary looks much larger though.
I can see this header make good high rpm power with a proper collector.
http://www.sr20-forum.com/florida/21350-fs-stillen-4-1-header-tampa.html
I can see this header make good high rpm power with a proper collector.
http://www.sr20-forum.com/florida/21350-fs-stillen-4-1-header-tampa.html