On Chrome, go to S-Tuner. Press F12 & go to Network, select car & find the part you need. Before pressing on the part to install on car, clear your cache (gray icon next to red icon in top left) & then select the part in S-Tuner (to install). In Network panel you'll get .mtl & .obj file, right click the .obj file, open in a new tab. Then in new tab, click right mouse click on text (coordinates) & press "Save text as" & save it has .obj (NOT .TXT as it suggests). This will not work on car chassis.