You're going to run into a problem with the attaching flange that bolts the exhaust manifold to the mounting bracket...
Take a look...
See the piece that sticks out on the right. Different years have slight adjustments in those mounting brackets.. Depending on the application you may need to weld in or create a new bracket. I know between 90-91 and 92-93 Integras they don't fit exsactly.