Post by
nametakennow »
https://forums.nicoclub.com/nametakennow-u713.html
Wed Jan 21, 2009 10:27 am
They help with accessories and issues like the lights dimming. I can't say I've seen conclusive evidence of horsepower gains.
It depends on the car. New or not, it could have a poor grounding arrangement. Previous Sentras have had poor grounding from the factory.