I believe the topic came up some time ago. And, I believe that I had said it was a gimmick. A means of relieving a driver/owner of money. When I looked inside of one, all I saw was a series of baffles. Just like the magnets that "polarize" the fuel, I would expect absolutely nothing from it. It gets approval from California EPA, because it does nothing to increase the polution. But improve anything? NADA.

Sorry you've been had.:tears:

Your idle is smoother because your truck is lighter, due to the reduced weight of your wallet.:thumbsup:

I wanted to find out first hand, so I did. I really didnt expect it to work, so I'm not too unhappy, I do wonder how it smoothed the idle out, that was nice for sleeping, but now that I have a tripac, it's a moot point.

by golly, that makes sense!!

well, I took it off and my mileage decreased by 1/2 mpg, I'm going to put it back on and see if it's a coincidence.