those "kits" are just wires and a relay... that's what I was talking about earlier... you can pay whatever the cost of that kit or you can spend 20 bucks max on all the wire connectors and realy you need... instructions for it are all over the place...
YES it makes your lights brighter... instead of your lights being on the alt. power supply it's on the bat. so it gets a fixed and more stable voltage.
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I am an A$$hole... take anything I say to heart at YOUR OWN RISK...
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