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Hey, I drive a 2003 Civic LX, and Im wondering if anyone can help me out. Im thinking of purchasing a Si head for a swap. Can anyone tell me what I need for the swap and how hard of an install it is. Ill need a list of all parts that I need. I was told that I just need the Head and a Vtec Controller. am I right? Someone please help..........

 
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well iv seen EX head swap but not SI, thats a good question but theyr has to be a reason that xproductions used EX maybe SI dosent fit but heres the EX head swap to LX http://www.7thgencivic.com/forums/sh...d.php?t=169411

 
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I don't think thats a possible head swap either but a EX head has been done many times

 
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Uhm, he's from Canada. He says Si, you hear EX.

Here ya go. DIY - DX/LX head swap to EX Vtec by xproductionz.

 
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Sorry, I forgot to Mention that Im Canadian and an Si in Canada is an EX in the States. and an Si in the States is an Sir here in Canada. Just thought id clear that one up...lol

 
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yea... i had tons of people ask me that before and i myself have gotten confused about it but now understand..

the EX in the U.S. is considered to be SI in canada for our 7thgen civics...


makes me wonder if the LX in the U.S. is considered the EX in canada.. lol





anyways yes you can.... if you buy a used head from someone in the states make sure its an EX... but if you buy it locally in canada it will be the SI

 
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Nope Canada doesnt have an EX model. Si = EX, Sir = Si

 
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If you do this swap and don't change the ecu and wiring harness lemme know... cause i have a extra vtec wire connector on the engine side, that way you don't have to cut the blue wire connector off, which will help you if you wanna go back to stock and resell the Si/EX head. I'll give it up for free, cause it's not a big deal, just lemme know when you are actually gonna do it cause if not then someone else might want it.

Oh and get make sure you get the head milled or check if it needs it. I just got done with the swap, and i bugged the heck outta Xproductions and Gearbox with all my questions before, during, and after. So i can help alittle and lighten their load alittle.

 
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You dont have to swap he ecu and wiring harness we didnt when I did mine I just use the vafc to control the vtec and to control the fuel differences between the heads.

 
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look at the links that people have posted they tell u everything you need.