Do these bolt straight into my factory headlight housings?

Yes. These are designed as direct replacements that use your existing mounting points — no modification to the truck needed.

How does the switchback function work?

The LED elements automatically shift from white (headlight mode) to amber (turn signal mode) when you engage your turn signal — single assembly does both jobs.

What condition do these arrive in — do they need any prep before install?

These ship ready to install. Inspect the housings and bezels for any shipping damage, then mount directly into your factory locations.