Install question
The speaker adapers let you run 5.25" drivers in the stock 4" door locations
the wiring harness would be needed if using the stock head unit with aftermarket amps and speakers
Tell us what you are planning to do, we'll tell you what you need
The fascia adapter is just a set of plastic spacers to go from <1999 Concert style head to single DIN, I don't think that'll help you. search here, I think most people end up making a custom panel to fit.
You'll need some kind of wiring harness that plugs into the stock wiring harness to get power, etc.
You're not using the stock speakers are you?
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