I have a 1999 Honda Civic DX - Calfornia that has the combo exhaust manifold/cat converter. The exhaust manifold has a crack where the O2 sensor is. Does anyone know what model years are interchangeable? Will a 1996 or 1997 fit on a 1999?

Thanks

 

1996-2000 should be the same. You need an exhaust manifold from a non-vtec motor (CX, DX, LX - d16y7). The EXs (d16y8) have the cat converter under the car.

Refer to the below link for more info and how to do the conversion if you would like.
https://www.hondacivicforum.com/foru...version-73237/