Pad Springs: Brake systems include small springs that help to position the brake pads correctly and keep them from rattling. These springs also aid in maintaining a small amount of space between the pads and rotor when not engaged, reducing friction and noise.
Fits for the 4 pot calipers from Audi Q7 4L, Volkswagen Touareg 7L, Porsche Cayenne 955
Number of the calpers: Porsche: 955352421 + 955352422
VW: 7L6615423 + 7L6615424
Brembo: 20.7673.03 + 20.7673.04