Will this sensor work with my stock exhaust manifold?

Yes. This is a direct replacement sensor that mounts into the factory O2 sensor port with no modification needed.

Do I need special tools to install this?

An O2 sensor socket and basic wrench set are standard. The sensor unscrews from the exhaust manifold — straightforward job for DIY or shop install.

What happens if the check engine light comes back after installation?

A new sensor should clear a faulty O2 sensor code. If the light returns, have the system scanned for other issues — a bad sensor wire, exhaust leak, or engine problem elsewhere could be the root cause.