The best car upgrades for off-roading in the hills and forests near Grandview near Kansas City MO would be upgrades to the suspension system, such as a lift kit or heavy-duty shocks, to improve the car's ground clearance and handling over rough terrain. Additionally, upgrading to all-terrain or mud-terrain tires can provide better traction and control. Other useful upgrades for off-roading include skid plates, winches, and snorkels to help navigate through difficult terrain and water crossings. For more information, Please visit https://brattbrothers.com/services/.