Each Skill Mod has a four tier rank of either one star, two star, three star, four star or five star rating with higher ranks giving improved results. Some Skill Mod ratings may have a slightly higher or lower value within each star rating. Each mod initially had only three tier ranks but a fourth was introduced with the application of the December 13, 2012 patch. Players that had already applied points to their Driver Skills were given corresponding Skill Mods relating to their currently implemented Driver Skills. The amount of given Skill Mods was capped at a maximum of 125.