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So, you've got the tight ass whip with the 24" dubs, and the air ride suspension. Or maybe you've got the bitchin '32 high boy with 350 hp. and candy paint!!! What do you do next Well, if you're like most. The stereo at best is still stock. Being that you're pretty mechanically inclined, and pretty handy with a jigsaw, you want to build a modest stereo system for that Saturday Night Cruise. This is where a Hardness Upgrade will set you apart from, and ahead of the rest. There's a lot to be said about doing it yourself. It's that sense of pride in showing off your work amongst your peers. After twenty years of tearing it apart and putting it back together again, I came up with a basic set up for almost any car stereo enthusiast to read and follow. So if you already have general knowledge of car stereo and how it works, this book should truly serve you well. BUT! If you're still taking your house speakers and hooking them up to your car radio, you really need this book. So have at it!