Originally Posted by rudebwoy

I think those ones in this thread are of no Function, some cars came with these properly fitted and tested to work from the manufacturer properly sealing off the rear area of the car, the ones here on Hondas does not seal anything off except for a fancy looking piece of metal or plastic in the center of the rear makes no sense. what about the rest of the rear bumper such as the exhaust and control arm areas?

So to answer your question I do think rear diffusers work, Just not these simple piece of art work people put on their show cars.

I know this reply will be met with harsh and smart *** comments but it is what it is.