I wouldn't attempt to group ALL electrical system mods into "bunk or no bunk". Automotive electric systems are a harsh, noisy environment... It wasn't that long ago that cars only had lights, a starter, a radio and a horn. Kits that work to stabilize and clean up the system can provide a cleaner, safer environment for today's sophisticated electronics. That's good.

Modern vehicles have very adequate chassis grounding systems. But mod-ers and installers of high wattage sound systems may tax the factory system, which is why it's best to install separate power and ground cables (and not use a chassis ground), and run them all the way back to your power source (battery).

The thing about the GRIP kit that bothered me was the claim that it would give a 3-5 HP increase. Just think about it - If this is ALL it takes to improve HP and increase fuel mileage, don't you think the car manufacturer's would jump on it.

I suspect why you are seeing more grounding kits is that the story sounds good (or that people want to believe it because of the high price of gas), they are easy to install, and the manufacturers can make 400-500% profit without much of an investment.

Just go to eBay and look at all the $8 Magnetic Fuel Savers, $15 ECU chips and $25 Air Typhoons...Unfortunately, they only exist because some of us are willing to trying them!!!