Is a cold air intake worth the money? I know it can increases power but does it decrease fuel mileage?

Does the Tornado actually work? anybody have one installed? what kind of increase did you see?

Throttle body spacer increase power and fuel mileage or just power?

Thanks

First, welcome to XOC.

Second, the search function can be very helpful if you're looking for information and it cuts down on the number of posts increasing the size of the forum database

Third, to answer your questions:
1) The cold air intake can increase HP but it's negligeable MPG increase, not really. They mainly make a nicer noise when on the throttle.

2) The tornado is a piece of crap that's not worth the thin metal it's made out of.

3) Throttle body spacers really don't do much, if anything, for performance or mileage. They do make an annoying whine when under throttle.