Do I need new gaskets when installing this manifold?

Yes. Replace the old gasket between the manifold and cylinder head during installation. Don't reuse the original gasket — that's a common leak point. Grab a new gasket kit before you start.

Will I need to drain coolant to get this out and in?

Depends on your engine bay layout. Check your service manual for coolant line routing around the manifold. Some setups require partial coolant drain; others don't. Better to know before you pull anything apart.

What condition is this manifold in — new or remanufactured?

The product listing doesn't specify condition. Confirm with support before ordering if that matters to your build. Some buyers prefer new; others are fine with quality remanufactured units at lower cost.