Do these bolt into the stock fog light housings, or do I need new housings?

These mount into your existing factory housings using the factory bolt points. No new housings required—just unbolt the old lenses, bolt these on, and you're done.

Will the smoke tint make my fog lights dimmer at night?

The tint will reduce raw light output slightly, but fog lights are meant for visibility in rain and fog, not max brightness. These are tuned for function over raw lumens—you'll still have adequate output for low-visibility driving.

What happens if I need to replace a bulb—can I use any 9006?

Any 9006 bulb will fit and work. You can stick with halogen, or swap to LED or HID if you want—the socket is standard. Just make sure whatever bulb you pick actually clears the lens housing on install.