does anybody have any opinions on how these work???????

 

Very dumb thing to spend your money (i think). Save and buy something better. And for the OP, they claim to gain HP from stabilizing voltage coming from the battery, alternator, radio and any other eletrical components on your car.

 

I have opinions on them, but I only have experience with one.

I think it's a waste of money, your ELD can add/subtract power from the alternator as it sees fit, you rarely see the power demand going over 14v.

How much aftermarket electrical equipment are you using?

 

OO man, I bought one off ebay with the APEXi sticker on it, claim to gain at least 5hp.............................. what a waste of money IMHO ......