Fits Gen 1 Mini Cooper stock front brake calipers (2002-2006 Hatchback and 2005-2008 Convertible, both S and non-S). Does not fit the JCW brakes.
The "S" is for street. These work great for street/autocross and light track duty. They dust a bit but are easy on rotors. Much better than factory pads for high performance use. For more serious race duty try the Porterfield R4-1.