Will this bolt directly to my turbo, or do I need adapters?

Mounting hardware and adapters are not specified — verify your turbo flange type and diameter before purchase. This manifold is designed for CA18 engines, but turbo flange compatibility depends on your specific turbo model.

Do I need to paint or prep the manifold before bolting it on?

Stainless steel doesn't require paint or primer. You can install it as-is, though some builders ceramic coat the outer surface to reduce underhood heat. That's optional.

What fasteners do I need to mount this to my engine?

Manifold-to-head bolts and turbo flange bolts are not included with this assembly. Source hardware separately that matches your engine block and turbo specifications, then refer to your service manual for torque specs.