Does this tubing need to be welded, or does it have slip-fit ends?

This is a straight length of bent tubing — no coupling or slip-fit ends are machined. You'll need to weld it into your system or use a sleeve coupler for connection depending on your exhaust layout.

Can I bolt this directly to an existing exhaust, or is it a raw material I need to finish?

This tubing ships as bare stainless steel and is weld-ready. No pre-welded flanges or mounting brackets are included — it's designed to integrate into a custom or modified exhaust build.

Will the stainless steel discolor or need any coating before installation?

Stainless naturally resists corrosion and patinas with use. No primer, paint, or protective coating is required before welding and installation.