Add this to your ItemDB.Xml
Code:
<VehicleArmory>
<Item itemID="101412" category="55" Weight="1000">
<Store name="Buggy" icon="$Data/Weapons/StoreIcons/Drivable_Buggy_02.dds" desc="" />
<Property durability="2500" armor="50" torque="813.49" omega="837.76" fuel="3000" fname="Drivable_Buggy_02" />
</Item>
<Item itemID="101413" category="55" Weight="2500000">
<Store name="Stryker" icon="$Data/Weapons/StoreIcons/Drivable_Stryker.dds" desc="" />
<Property durability="6000" armor="70" torque="1626.98" omega="837.76" fuel="4000" fname="Drivable_Stryker" />
</Item>
<Item itemID="101414" category="55" Weight="2500000">
<Store name="Zombie Killer Car" icon="$Data/Weapons/StoreIcons/zombie_killer_car.dds" desc="" />
<Property durability="3000" armor="55" torque="400" omega="837.76" fuel="3000" fname="zombie_killer_car" />
</Item>
</VehicleArmory>