Originally Posted by Racter
i would go for a 4-2-1 one piece, 2 piece is easer to install though. 4-2-1 because if you think about, ill explain this with air and a pipe. air goinging into 4 slots then being pushed into 1 emedilty is quite hard, but going for 4 slots down to 2 then 1 would make your car breather better. thats how i take it.
Where in the world did you get this crap from? That makes no sense and hardles logical reasoning.
You will be hard pressed to find a 2.5" collector (JDM) Header that is 4-2-1 unless you are willing to spend $800+ The DC and OEM JDM headers are each 4-1. They perform well and despite the misinformation above, 4-1 actually does very well at moving air and before the high performing headers we have now they were know to make less low end TQ and more high end power. This isn't really the case anymore. I'd suggest you consider an OEM JDM 4-1 since it is sub $400, has better ground clearance than the DC header and is stainless steel.