Will this bolt straight to my stock exhaust manifold location?

Yes, this header mounts at the factory bolt points on the V10 block. You'll need to verify the gasket and fastener compatibility with your existing exhaust system before installation.

Does stainless steel need any prep or protective coating before install?

Stainless steel resists corrosion on its own, so no primer or paint is required. You can install it as-is, though some builders apply high-temp coating for aesthetics or additional protection.

What do I need to connect this to my downpipe or exhaust system?

The header outlet diameter and thread pattern determine your connection point. Measure the outlet before ordering a flange adapter or downpipe — don't assume fitment without confirming the mating surface size.