Does this header bolt directly to my factory exhaust manifold bolts?

Yes. The header uses factory mounting points — no drilling or welding required. You'll need a gasket between the cylinder head and header; check your service manual for the correct specification.

Will I need to weld or fabricate a new downpipe connection?

The header outlet is designed to interface with your stock exhaust system. Measure your factory downpipe inlet diameter and compare it to the header outlet before purchase to confirm compatibility.

What prep work is needed before installation?

Clean the cylinder head mounting surface and apply a new gasket. Coat the stainless header tubes with high-temp ceramic or paint if you prefer a finished look — raw stainless will develop a patina over time but won't corrode.