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Does anybody know why all headers for our Civic are EX Only? What makes them only fit the Si? Is there a way to make them compatible with the Dx format? let me know thanks

 
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Do a search on the site. I believe that the head is just the DOHC Vtec head right as opposed to the SOHC non Vtec head? Is this what you are talking about? THere is a DIY on a head swap for the SOHC to a DOHC. And if you need a head I think you can look at Black Gold in Nisku for parts. They may have one laying around.

 
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Well I think that the only engine that has the dohc is the Si-R. Im pretty sure the only difference between the dx and ex (si) is the vtech computer and some other small differences but i could be wrong, let me know..Also can you get my the link for the head swap. thanks

 
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WOW there's some bad information in this thread. The headers from a American EX will fit a Canadian Si. The LX and DX headers are slightly different from the Si (EX) counterparts. They will bolt on to the head, but you will need a exhaust shop to modify your B pipe to get them to match up if you want to use them on your Si.

 
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So You are saying that an si or Ex aftermarket header will bolt on to a dx engine, but the exhause wont line up? How would you get them to line up then? pm or email me,,,or just post, thanks

 
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Yes the EX (Canadian Si) headers will bolt onto the car. You need to have your b-pipe modified. You will either need to get a muffler shop to extend your DX's b-pipe, or get a full EX (Si) exhaust. Notice on the attached image, the length of the b-pipe (circled for each model) is different, as well as the angle.

 
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yea if you have a DX you can buy an ex header, an ex downpipe and ex catback...

 
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well i have an HP racing EX header that i'm selling. it fit on my SI no problem.

 
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pics?

 
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http://www.7thgencivic.com/forums/sh...d.php?t=239722

there's some pics

 
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There is also Kamikaze headers out there (which are made for the DX/LX) .. as well as OBX, but I wouldn't trust OBX.

I personally went the EX way, as there are more catback exhausts available for that type of set-up.