As we have been improving the brakes on our 2014 WRX Pikes Peak Race car, one of the issues we have had was finding a good option for the rear. Front brake up-grades are widely available and we as we have been making the car faster, we have now put on the Stoptech 328mm ST40 brakes, and they have been working well.
But we have noticed that our brake bias has shifted largely to the front, and we have discovered that this is causing issues, and preventing us from getting the performance out of the brakes that we need.

So we have been looking for another upgrade option, and we have now put the STI Calipers, and the 316mm rotors on our car, and it turns out that it is now a great options.

If you have a GR WRX (2008 - 2014) and you are tracking your car, and especially if you are running R-Compound tires, this is something that you should consider.

If you are interested in anything that we discussed in the video, here are links to those products on our web-site:

KNS-007 Caliper Adapters

 

Black STI Brembo Rear Caliper Kit - Click Here!

For the Rear STI DBA Rotors that you need for this conversion, click here!

-  Jon Cooley