Metra 99 3309B Single Double Installation Review

Perfectly matches the color and structure of the black panel. It comes with all the necessary clips and cables for easy installation without having to reuse the clips from the original mount. It took me less than 2 hours to assemble.

Worked great for my setup. I installed JVC in my Spark and this kit kept OnStar and doorbells. My only complaint is that the brackets that attach to the head unit are made of thick plastic and offer a very tight fit when attempting to mount them in the dash. I would prefer metal with tapered screws.

A lot of extra cables that are not even used. It literally comes with a tag in a separate bag that isn't even used, so why take it with you at all. Pretty horribly confusing guide that gives you labels for straps that aren't actually labeled on the straps themselves. You can also just use some of the main pictures/diagrams in the manual instead of verbal descriptions. Also, the only thing that stays in my car when things are on is the Onstar, which I don't even use. With connector for steering…