Will this bolt directly to my factory catalytic converter?

Yes. This catback bolts to the factory cat on 2.3L turbo models with no adapter or modification required. Just unbolt the old system and bolt this one in place using the existing connection points.

Do I need to use high-temp sealant or locking compound on the joints?

Mounting method and hardware specs are not detailed in the product data—test-fit first before deciding on adhesives or fasteners. Bring it home, check the fit and flange contact, then source sealant or gaskets accordingly.

Does stainless steel require any prep or coating before install?

No prep needed. Stainless arrives ready to bolt on. It's naturally corrosion-resistant, so you won't need to prime, paint, or treat it before or after installation.