Diffuser? looks more like drag.. anybody ever notice that all these rice burners throw all these wings, scoops, flares, body mods, fins, vents, bling bling crap, ect. On their cars but don't check to see if it helps? If all your looking for is looks then spend $205 +20% but before you go modifying your car take a look at the real race cars, and almost all exotic cars are sleek, and have as little amount of drag as possible. Now our car "crossfire" with exception to the grill and the faux-side vents has very little drag, our car is a wing, and as we all know a wing has as little amount of drag as you can get. That's why Chrysler installed a rear wing and lower diffuser. To cancel "lift" at speed. So throwing more crap on it is "just throwing more crap on".