Will this mount at the factory rocker points, or do I need to drill?

These mount at factory rocker points — no drilling required. Line up with the existing holes and fasteners from your old mirror will work the same way.

Does the matte finish need any prep or sealant before I install it?

The matte finish ships ready to mount as-is. No primer, paint, or prep needed. Once bolted on, it's done.

What if the mirror doesn't line up perfectly after I bolt it on?

Test-fit it first before fully tightening. If alignment is off, the mounting bracket may need minor adjustment — refer to your vehicle's service manual for torque specs and bracket adjustment details.