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I'm planning out doing a K20a swap into a 1990 CRX Si, and I was wondering if the swap only worked in the EFs or would it fit in a Si too? I keep seeing the EF instead of the Si on this forum, so I was getting confused. Sorry if this question has been answered somewhere else.
 

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all CRX and 88-91 Civics are EFs, so that Si is a EF also.(Si is just the trim, like DX and HF)
 

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Dc5itracer said:
Actually all 88-91 civics are ED.Ef is r japanese counterparts ef8 is crx si-r and ef9 is civic sir
of course, but noone calls their cars ED's except for the sedan guys(well from what ive seen) :)
 
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