13 Compound is the most popular Pad used by most of the Top Drivers.The 13 compound is a very aggressive pad for maximum stopping power. This compound is only available in the LD20 size.
11 Compound is a harder compound that will last longer and wont slow the car as much as 13 for the very high speed tracks
These pads are used on many F-2000 cars and F1600 cars that use the Steel or Alum AP Calipers
USED ON THESE CALIPERS BELOW IN ALUMINUM AND ALSO STEEL AP LD20 CALIPERS
10-CP2577-14E0 AP ALUMINUM CALIPER (ALSO STEEL)
Wil-120-14376 WILWOOD LD 20