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Who can tell me what is the best kind/brand of header for my 03 Ex. I've heard of different types like 4-2-1 or the 4 into 1. Is DC the best grand???

 
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get the 4-1. With the 4-2-1, the exhaust pulses are interrupted. As for which one specifically, on a dyno test of a 1992 1.6L SOHC Vtec engine with 2.25" exhaust pipe to a Sebring muffler, the Genie header worked better overall than both the DC header and a JR Gen V header. It all depends on your setup, though.

 
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dc sucks period. anyone who says otherwise is working for them

 
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yeah, i hear DC is pretty much the same as the stock EX header, so it's a waste of money. i dunno, i think the best ones that people have been talking about are the kamikaze and HP racing headers. anyone confirm this?
or maybe they're only good with a high-flow cat i'm not sure exactly, but someone will post here soon with clarification

 
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Check out my header, they are Kamikaze and they have bigger tubes than DC, hence more air flow. Apparently you should go with Kamikaze if you have LX and HP if you have EX. I think.

 
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for ex autos, HP racing header. Period.

 
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bigger tubes give you more high-end power, but well-built smaller diameter tubes gives you more low-end.

 
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search and you shall receive.

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