Could a CRX Si 91 headers fit on Civic Si 1998

They are both 1.6 SOHC motors... whit VTEC !!

could it fit ??

 

It is header for one.......

Two the reason they are made for the model is the body not the engine........so, being that the CRX is so small my answer would be, not without modification to the b-pipe of your exhaust.

 

Also, a 91 CRX Si motor does not have VTEC. The port configuration on the heads is the same so it should at least bolt up to your motor. As far as mating to the cat on the newer car you might need to have an extension fabbed up.