To deflect the wind so it doesn't hit a flat surface, most of the time, a trailer, but in our case, a dump box. It's supposed to save you on fuel but that's not my main concern. I just want the truck to pull beter...
Anyone run one of these on the top of their truck? My 3500 has been having a hard time dealing with full loads and the bigger chipper. There seems to be two types, concave and convexe. Any brands or recommandations...
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