Will this header fit without removing other components?

It's a bolt-on design, but you'll need to remove the OEM header and associated exhaust piping to access the mounting points. Check your vehicle's service manual for the exact procedure — access varies slightly depending on whether you have air conditioning or power steering.

Does this need to be painted or treated before installation?

No prep required. The black finish is applied and ready to install. You can bolt it on straight out of the box.

What hardware comes with this header?

The assembly ships as a complete header. For mounting hardware or gaskets, verify what's included before installation — you may need to source manifold gaskets or fasteners separately depending on your specific vehicle configuration.