Ok, here's the deal with grounding systems. All of the sensors in almost all cars send signals by varying voltages. Resistance in power lines causes a voltage drop, which leads to an inaccurate signal to the computer. By the way, they use ground as a reference point. What grounding kits do is improve the ground path of the car, by giving the electricity less resistance. Which means less voltage drops which means a more accurate signal to the computer, which leads to improved mileage, increased power, smoother idle, and longer life. I know this because I have tested and done comparisons for my self. The key for them to be effective is to have the kit done correctly. This means grounding points all over the engine bay. Example: Engine block, head, alternator, chassis, battery, and any other points of the car that use chassis for ground. The reason for grounding the head is that the spark plugs are grounded through the head. Having a better ground for the spark plugs means a stronger spark, which gives better combustion, more power and improved efficiency. Whoever thinks this is a "ricer mod" is because of the marketing that was behind them initially. The manufactures of these "kits" always gave them a "Fast and the Furious" look to them and always advertised them on a compact japanese car. Doing an upgrade to your grounding system does nothing but good to the car. The older the car, the more you notice a difference, since the factory electrical connections become oxidized over time. This is what the kits do, not to sound cocky, but if you say I am incorrect, you are wrong. I may not be including every little thing they do, but this is the general idea. If you take any car, dyno it a hundred times, and take the average power, install a grounding system, dyno it another hundreds times, take the average, and you WILL see some improvement, GUARANTEED. It makes only a few HP, but an improvement, which proves that they WORK. Don't buy a kit that costs $20 bucks, because the wire needed for a good kit costs more than that. Get a kith that uses high quality wire, high quality connectors that are coated in either gold or silver to prevent corrosion, and they have SOLDERED connections. Also, the fact that it puts less stress on the alternator is negligible. and to correct trobertson7, a '92 honda civic uses a 65-75 amp alternator. I have not looked up the numbers but I'm sure ours is closer to 100 Amps. To see the effect of alternator strain on your car, when you are idling, turn on your headlights, foglights and hold the window switch up, when you windows are up, and watch your tach. That about sums it up.