has anyone ever tried these in there car and if so did it help with MPG?
http://cgi.ebay.com/ebaymotors/Bette...28575854QQrdZ1

Several months ago, there was a program on TV, I don't remember whether it was mythbusters or another program that tested this product and found that it just didn't work. If anything it decreased the miles per gallon. When it was brought to the manufactures attention they didn't coment other than to say that they didn't use it properly in there tests.

Can anyone else remember that program or shed some light on this topic?

NO. That thing will swirl air, then your MAF screen will straighten it back out. The MAF likes straight air.

http://www.bonnevilleclub.com/forum/...ic.php?t=29283

They don't work, save yourself 25 bucks.

Read the post that Bonneville94V688 linked above. It says it all and then some.

Bottom line is, those things may help certain carburated engines, but not with EFI engines.

thanks guys! I am sorry if some of my questions have been covered in prevous post! Its hard to search them all.
Thanks

This isn't mechanical related. Moved to General Chat.

Easiest way to put it, they don't work........ Save your money for better mods, there are a few good ones on here.....

If it was that easy to improve MPG and such, the manufacturers would have done it already.