For your money, the best aftermarket investment you can make! Hellwig Big Wig sway bars are an extremely effective handling upgrade you can make to your heavy duty truck. Specifically designed for heavy duty tow and haul applications, Hellwig Big Wig sway bars offer quick bolt on installation that are engineered to perform. An immediate improvement will be felt when you drive through the first corner with a Hellwig Big Wig sway bar installed. Most trucks do not come equipped with factory rear sway bars and see a drastic increase in body roll when towing or hauling a heavy load. Hellwig Big Wig sway bars are the largest diameter sway bars available from Hellwig and are precision engineered components to optimize handling for towing and hauling.