Will this bolt directly to my stock manifold mounting points?

Yes. This header uses factory mounting locations on E36 chassis—no drilling or custom fabrication needed. Hand-tighten first to confirm alignment, then torque to spec per your service manual.

Do I need a new gasket or o2 sensor bung adapter?

Gaskets are not included with this header. You'll need a fresh head-flange gasket for the install. O2 sensor bung compatibility depends on your specific sensor configuration—verify before ordering if you're retaining factory emissions equipment.

Should I have this ceramic coated or painted before installation?

Not required. Stainless steel won't rust under the hood. Ceramic coating is optional for aesthetics or thermal management—it's up to your preference and budget. Install as-is if you want to skip the extra step.