The Subaru Impreza GRB STI comes with pretty decent brakes as standard; front 4-pot and rear 3-pot calipers with 2-piece drilled rotors. However, there is always room for improvement and if you want something that will fill up the wheels, allow neck-breaking stopping power, and eliminate brake fade altogether, then maybe you could think about taking it to the next level with this setup...

 

What we are looking at is a front 356mm 8-pot and rear 330mm 6-pot combination with drilled 2-piece straight slotted rotors, silver anodized calipers, and our high temp race pads. This is the front set...

 

 

 

And this is the rear set...

The total cost for that setup is GBP2058 including race pads, plus shipping. When compared to most other brands of BBK on the market nobody can beat us on price.

It might also be worth considering moving down one size of caliper to the front 356mm big 6-pot and rear 330mm 4-pot. With this setup you will lose a little torque but gain a lot of responsiveness. Not only that, the total price is is GBP60 cheaper!