Stock EG hatch back SI and dx cat-back muffler..any differences between them?tip size wise ?thanks
i called my local honda parts and they told me they are 2 different serial numbers..

 

^ that is cause they are two different parts, the Si will fit on a DX, but you would be best to replace the exhaust manifolder, cat and catback with an Si one on a DX, but the other way arround is a different manner. the main thing that i know of it that the cat and exhaust manifold on the Dx/Cx/Lx is all one part, or is it the other way arround.. anyway the point is ifyou have an Si then get Si parts, and if you have a DX and are replacing the exhaust then just swap everything with Si parts

 

I got a honda civic hatchback dx 1990 tryin to put a b18c1 engine in there with turbo think thats gonna be kinda hard u think that i would have to take out the a/c unit maybe i want it in there sense i'm in florida ahaha

 

you should make another thread for this since the subject of the thread doesn't match your question and it might make it more difficult for you to get answers