I wrote this in another thread and copied and pasted in hopes of benefitting others in the future.

I gave a Sun Auto Hyper Voltage System and Hyper Grounding system a shot and it surprisingly works. Idle is smoother, revs are cleaner, shifts are smoother, voltage is more consistent (odyssey battery), and things hooked up to electrical system have more power. My remote bottle opener for my nitrous bottle seems to now be turbocharged! More power? Butt dyno cannot tell with such little gains if any.

http://www.sunautomobile.com/