Will these headers bolt directly to my stock exhaust manifold location?

Yes. These mount at the factory cylinder head locations with no drilling or welding. You'll need to disconnect the stock manifold and bolt these in its place using existing engine bay attachment points.

Do I need to prep or paint these before installing them?

Stainless steel doesn't require primer or paint—it's ready to bolt on as-is. The material handles exhaust heat naturally without coating breakdown.

What do I need to seal the header-to-cylinder head connection?

Header gaskets are sold separately. Grab a stainless steel or multi-layer gasket set matched to your Titan's cylinder head port pattern before installation.