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im looking at buying the dc sports ceramic 4-2-1 2 piece header for my ex. now about the installation for anyone whos done it...does the front bumper have to come off for any reason or can it all be done from underneath and in the engine bay? just wanna know cause its a biiiiiiitch to take off my bumper now

 
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no u dont have to take off the bumper. you first unbolt the heat sheild then the header itself. take off the gasket then install the new gasket and the hearder then bolt it on. your done

 
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The DC is a 4-1, not 4-2-1. Anyway, I just did this mod last weekend and it's not that bad. The only problem I had was getting one of the heat shield screws off. Those bolts were on tight! After that, no problems at all. Jack the car up from the front, put your jack stands in place and you're ready to go.

 
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thanks guys! and the header comes as either 4-1 or 4-2-1, i want the 4-2-1 though

 
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Call DC and ask them, it's a 4-1. It's advertised all over the Internet as 4-2-1 but it is only available in a 4-1. That's been posted on this forum numerous times as well.

 
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well he said it was a 2 piece header; this is the first time i heard of it from dc.

 
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Three places I called when I was looking for the best price told me it was a two piece header also. Then they would give me the part number and it would be the same part number for the one piece 4-1 header. I finally stayed on hold forever and talked to someone at DC, and was told the only headers available for the 2001 Honda Civic EX are the ceramic & stainless one piece 4-1 header, upper piece only. The part numbers are 5019C for ceramic or 5019S for stainless.

 
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werid, i hate it when companies advertise wrong. o well, how do u like the header though? where do u feel the gains?

 
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Now I'm just a weekend newbie mechanic so I'm no expert on performance modifications. I have the ss header in combination with the AEM CAI and the Magnaflow exhaust. This combination works great for me, of course it sounds nice for staters and I realize the extra gain throughout the entire range but most definitely when I get up around 50 & higher.