Anything short of a 15 HP increase isn't going to be noticeable. In the link above they got 9 HP, which I think is a little high. Claims are for around 3-5 HP.

But this isn't why we did it. Contrary to popular belief some mods are done for things other then HP. I know very hard to accept.

It has been proven to reduce voltage drop and keep electrical systems running better.

amx, if you killed 3 batteries in 3 years I think you have bigger problems in your car then a bad ground.