[ichitaka05]

Originally Posted by tranzformer

As I said I don't know much about this so will defer to you. I found the article that I remember reading several weeks back.

http://rusubaru.com/equal-length-vs-...ength-headers/

That article could be all wrong?

Nice find & I totally agree w the article. Specially if you wanna push over 400hp. BUT I'm only talking bout stock/OEM.

Subaru knows this... but why they still use uel on S series STI (S202, S203, S204, S402)? If they really want, they can make el headers for them.

Answer to this, IDK. Only Subaru knows. But thing I know is boxer engine have more stuff to worry than putting more stress on #2 & 4 cylinder. btw, #3 cylinder have higher chance of comp ratio failure than #2 & 4. Why? IDK

Number 1 thing they need to worry is crank bearing. higher the rpm goes, boxer engine have more chance of having crank bearing failure. I want to know how Toyota gonna solve this problem, cuz I'm expecting this car to at least beat GC series Impreza redline.