Do I need to use any sealant or adhesive with this gasket?

Gaskets in this application are typically installed dry — the metal-to-metal clamp load between the header flange and cylinder head creates the seal. Only apply sealant if your specific engine manual calls for it.

Will this gasket work if I'm reusing my old header?

Yes. This gasket is designed as a replacement piece for header installs on D-Series engines, whether you're running a new header or refreshing an existing one. Just make sure the header flange surface is clean and flat before installation.

What hardware is needed to bolt the header down?

Mounting hardware is not included with this gasket — you'll need the factory studs or bolts specific to your D-Series engine configuration. Reference your service manual for torque specs and fastener count.