Do I need to use a gasket or sealant between the manifold and head?

Yes—use a quality manifold gasket rated for your boost level. Don't rely on sealant alone; thermal cycling on a turbo setup will break adhesive-only seals.

What mounting hardware connects this to my turbo?

Hardware for turbo mounting is not included with the manifold. Source your turbo flange bolts and clamps separately—bolt specifications depend on your turbo model and target boost level.

Can I paint this manifold before install?

The stainless steel finish will withstand high exhaust heat without coating. Paint is optional and not necessary for protection or performance. If you choose to coat it, use high-temp ceramic or ceramic paint rated for manifold temperatures.