Quote:
Originally Posted by IsaacCarlson
wheel arch filler(the bristle stuff),
|
I wouldn't bother with this. Wheel drag goes down (to a point) as the ratio of wheel volume to wheel housing volume increases; adding some open bristles to the wheel arch 1) doesn't affect that ratio and 2) doesn't stop the transfer of air from the high pressure in the wheel housing to the lower-pressure flow along the body anyway, since you don't have a solid surface there.
The belly pan is a good idea. I don't know why manufacturers don't offer a skid plate package to truck and SUV owners that also reduces drag/improves mileage; it'd be an easy way to print money.