Originally Posted by jamal
The Subaru 2-pots will bolt to an STi Brembo backing plate and there are 290x18mm rotors with a bigger 190mm parking brake hat. This is so rally cars can easily switch to 4/2-pot Subaru brakes for wheel clearance/group-n rules. So the Brembos will bolt to an 06 wrx backing plate, but need a rotor with a 170mm parking brake hat. Here's a thread
about fitting the brembos to other cars with the new Kartboy brackets and DBA rotors. The first sets have been made as of this post. There are also taller parking brake shoes available.