i was wondering if i could put a 90crx si internal into a 94 civic ex with the injectors, valve spring, intake manifold, cam shaft,rocker arms, and the cam gear need some info real quick and would this installation bring up some H.P or do i needa bore out the intake manifold to fit the ex..........

 

The injectors will not work. 90 Si = OBD0 and 94 EX = OBD1. The valve trains will be completely different since the EX is a SOHC VTEC. The intake manifold will work, however I don't think there is an advantage to using it. The cam gear should work as well.

Hope this helps.

By the way new post not new poll.

 

or you could just buy a and install a whole vtec motor it would be easier

 

Like the rest of the guys said...you aren't going to be able to use much of anything except the manifold.