Kartboy knows when it comes to brakes you just can't play around. If you like to put the FHI 2 pot rear brakes on your 02-05 WRX or GC Impreza, you need this adapter. This allows for the upgrade to be a simple bolt on procedure. These adapter kits also include all the mounting hardware utilizing high grade bolts, which will be able to hold up against shear stress.
Mounting these calipers also requires the use of 06-07 WRX rear rotors, and the proper calipers to complete the install.