PowerStop

The best PowerStop brake kits are the Z26 Street Warrior for aggressive street driving and the Z23 Evolution Sport for a stronger-than-stock daily setup — for a 15-21 WRX, the Z26 rear kit (K6977-26) is the go-to, while 08-17 STI owners should look at the Z23 rear kit (K5305). Both lines come as complete kits with pads, rotors, and hardware, so you get matched components instead of mixing brands.

PowerStop builds brake kits aimed at drivers who want better stopping power than factory without jumping to a full big-brake system. The Z23 line pairs carbon-fiber ceramic pads with coated rotors for cleaner wheels and stronger bite; the Z26 steps up the pad compound for harder street driving and heavier vehicles.

Match the kit code to your exact car — brake sizes changed across WRX, STI, and BRZ/FR-S/86 generations. Follow the included bed-in procedure to transfer an even pad layer, or you'll get judder and noise.

The brand here is PowerStop itself — our full PowerStop lineup covers Z23 and Z26 kits for WRX, WRX STI, and BRZ/FR-S/86 fitments.

Related collections: all brake parts, brake pads, brake rotors, and big brake kits. Featured products: the Power Stop Z26 rear kit for 15-21 WRX, the Power Stop Z23 rear kit for 08-17 STI, and the Power Stop Z26 rear kit for 13-19 BRZ/FR-S/86. Also see our guide to the best brake pads for the Subaru WRX.

What's the difference between Z23 and Z26?

Z23 Evolution Sport is the sportier daily-driver line — stronger bite than stock with low dust. Z26 Street Warrior uses a more aggressive pad compound for heavier vehicles and harder street driving.

Can I install a PowerStop kit myself?

Yes, if you're comfortable with basic brake work — pads and rotors are a straightforward bolt-on job. Flush the brake fluid while you're in there.

Do I need to break in new pads and rotors?

Yes. PowerStop includes a bed-in procedure: a series of moderate stops to transfer an even pad layer onto the rotors. Skipping this causes judder and squeal.

Will a kit for a different year fit my car?

Probably not — brake dimensions vary across WRX/STI generations. Use the kit code and your exact year and model on the product page before ordering.