I have a 91 civic ex and i plan to put a b series in it. I've heard that i ned some kind of harness, is it true and what harness? What else do i need?

 

Use your stock harness from your stock motor. The rest of the info you need can be found here https://honda-tech.com/zerosearch

Or since I am a nice guy, I'll just attach a quick link from my favorites:

http://dmocda.com/B16.html

All the information you need is readily available right here in this forum. Read the FAQ's and search for the information here, on Yahoo, Google. We answer this question daily, 10 times easily.

 

<FONT SIZE="3">http://www.rywire.com</FONT>

Rywire offers this package to eleviate the headaches associated with this wiring.

For a list of parts you'll need and shtuff see http://www.droppedcrxsi.com