Rear spats should help too, if you find the right placement for your car. Also those side skirts along the runners under the doors (name?)... those apparently can help keep air from the sides slipping under the car and getting tangled into the rear axel and muffler and bumper and such. Someone on here, I think, made them out of lawn edging, starting fro the front wheel well, to the inside of the tires running out along the edg of the frame, stopping at the rear wheel-wells even with the outside of the rear tires. The curve in the lawn-edging gave the assembly sufficient stiffness to resist wind, I'm sure. It's a design I plan to imitate after I lower my car. But first, I have to get it running normally again. Today I pick up new parts from Autozone. Wish me luck...