Don't waste your money.
My first impression was not very good when I recieved the product. My stock alternator cable is at least 8 gauge, and this thing uses 10 gauge cables. I was a little bit skeptical of how it would help since it seems that all it was going to do is restrict the flow of electricity from my altternator. When I installed it on my alternator, I made sure all the connections were solid. I solder everything since those crimp-on butt-connectors come loose. Within 24 hours my battery, an Optima Yellow Top, was dead. I did not notice any difference in the level of the alternator whine, only the fact that my battery was dead. I cut the thing out and jumped my car and everything was okay again.<BR><BR>My suggestion to anyone would be to avoid this cheap short cut and spend the time and money on getting a better alternator, better cables, and make sure that you have a good ground. This was a complete waste of time and money and a pretty much useless piece of equipment.<br><br>[<b>Editor's Note:</b> Thanks to this customer's comment, we have added a note to this products description to point out the wire gauge.}