ive seen it advertise but i haven't herd any reviews and testimonials about them anybody herd or have a review for me because i am giving my 92 camaro rs a tune up and i herd they improve fuel economy, power, and emissons

 

They're crap, that's my review. I belong to a car club, and a number of members received free sets to test (not me luckily). A larger majority (more than half) of them experienced harder starting and a crappier running engine. The rest saw no difference.

 

Ive HEARD nothing about them, but Ive HEARD that most all 'gimmick' plugs out there only net set a small gain that you will only notice the difference on a dyno. Stick with stock champion or AC Delco and save 5 bucks a plug. Thats what Ive HEARD anyways.....