Save on fuel: Using CFD (Computational Fluid Dynamics) testing on a trailer/tractor combination there was a 0.4% fuel savings with slotted mudflaps.Weight savings: On a truck/trailer combination using 4 flaps you could expect at least an 8 lb savings over a 5 lb rubber flap.
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Weight savings: On a truck/trailer combination using 4 flaps you could expect at least an 8 lb savings over a 5 lb rubber flap