Will these plug into the factory connectors without harness modification?

These are engineered as direct replacements with factory mounting points. Confirm your vehicle's connector type before ordering — some model years use different plug configurations.

Do the housings come assembled and ready to bolt on?

Yes. Both assemblies arrive complete. You're installing them straight from the box onto your existing mounting brackets.

What's the return window if they don't fit my application?

Check the fitment details on the product page — they're listed separately from this description. If you're unsure before purchase, reach out to support with your VIN to confirm compatibility.