Do I need new gaskets or hardware to install this?

Check your vehicle's service manual for the exact bolt spec and gasket size at the manifold connection. This assembly bolts to factory points, but gaskets and fasteners are sourced separately to match your specific engine configuration.

Will this fit if my exhaust has been modified downstream?

This converter is engineered for factory exhaust routing. If your system has custom piping, bends, or diameter changes past the Y-pipe outlet, test-fit before committing. The assembly connects at OEM manifold points, but downstream compatibility is on you to verify.

Does this need any prep or coating before installation?

This assembly ships ready to bolt on. No priming, painting, or surface prep required. The catalytic converter itself will reach operating temperature immediately upon startup and doesn't need topcoat protection.