Originally Posted by Mike-in-Orange
They do a nice job of slightly blocking the opening of the intake and then adding a tiny bit of turbulance to the incoming air. The first is a negative (especially in the cars with an intake larger than the diameter of the piece and therefore requiring the additional clamping mentioned in the instructions) and the second means absolutely nothing as far as power and/or fuel economy go.
Spend the $89.99 on gas.
Or oil.
Or flowers for your wife or girlfriend (but not both) on Valentine's Day.
I would agree. It would seem that turbulence would add something to the manifold mixing on a carbuerated engine and possibly generate more effeiency. But on our FI engines, it would add heat, increase flow resistance and rob energy. A laminar flow would be better.
Buy the flowers.......or an SRT
roadster with a stick