They come standard equipment on the SRT6 and I thought I had a used pair coming...but not happening now.
The intent is to guide the flow of air under the car to escape the rear smoothly...
anyway you see them on lots of Road Racing Cars and Super Cars...

If we wanted to talk trash with Non-Crossfire Owners, We could say...
"They focus the air exiting the undercarriage across the exhaust exit area to generate turbulence causing a scavenging effect on the exhaust system which produces more horsepower in the higher RPM Range. More Exhaust Out draws more Fuel IN which equates more horsepower!"

I think they are just the right thing...

SO, after all that...Has anyone found a source that is priced UNDER the $200.00 Mopar wants?? OR is that THE ONLY source??
It's definitely a "GOTTA HAVE"...for me anyway.
-JD