Does this bolt straight to my factory catalytic converter?

Yes. This catback mounts at the factory connection point downstream of the cat. Bolts directly in—no adapters or modifications needed.

Will I need new gaskets or hangers when I install this?

You may want fresh exhaust gaskets at the flange connection. Hangers and brackets—check what condition your stock rubber and hardware are in before ordering extras. The system itself uses factory mounting points.

Can I keep the resonator, or does this replace it?

This is a complete catback system, so it replaces everything from the cat back. If you want to keep stock components, you'll need to source a different exhaust section.