Subaru WRX STI / WRX STI Limited 2011-2012, Z16 Evolution Ceramic Rear Brake Pads (16-961) by PowerStop®. Contains one axle set of Power Stop Z16 Evolution ceramic rear brake pads and rubber/steel shims. Power Stop’s Evolution carbon-ceramic pad formula uses OE positive mold technology to ensure a uniform friction density throughout the pad. This helps control noise and premature wear.
The true ceramic formula also generates far less ugly brake dust on your wheels, and wears less cast iron off your rotors. Every set of pads is supplied with Power Stop’s engineered dual-rubber-backed shims, which provide 6 times the noise reduction of the OEM plain steel shims. With 20% more stopping power, these are the pads to choose for everyday use. They’re manufactured to OEM standards, with all the proper slots and chamfers for a perfect fit and long life.
Here’s another Power Stop exclusive: Thermal Scorching. When brake pads are properly broken in, there’s a band of pad material several millimeters thick that’s been baked free of organic binders. That band progresses through the pad as it wears, keeping the gummy binders from transferring to the rotor surface and reducing brake effectiveness. Power Stop Z16 pads are treated with their Thermal Scorching process to establish that band before the pads ever leave the factory. That means a fast, consistent bedding-in.
Power Stop also uses the best technology for anti-squeal shims: constrained steel. A sandwich of two layers of steel with a viscoelastic layer between them prevents acoustic coupling between the pad and caliper piston, eliminating brake squeal. Other manufacturers attempt to use a single layer of steel or a layer of Teflon to achieve this. Power Stop’s solution, while pricier, is far more effective.
Founded in 1997 in Southern California, PowerStop began with the goal of bringing the benefits of superior brake components at a reasonable cost to amateur racing and backyard performance enthusiasts everywhere. Company management and engineers believed then, as they do today, that better brakes make driving more enjoyable and safer for any vehicle, terrain, and driving style – not just racing. They developed a philosophy that while brake components cannot be superior without the most advanced materials, they also cannot perform in a superior fashion without matching the exact tolerances of each and every individual vehicle they are created for. Relentless development and testing led to brake pads, rotors, drum shoes, and other related components that delivered uncompromising fit and operation, and Power Stop’s customer base grew exponentially from positive word of mouth. The company still has its original passion for creating the best products at the best possible prices, so when it comes to replacement brake components for your vehicle, Power Stop is the only name you need to know.
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The pads and rotors that came in this kit were a perfect fit for my car and seem to be of high quality. Installation was simple, except for the suggested pad bedding procedure which required some crazy driving in my neighborhood. So far there has been no squeaking when applying the brakes, and no noticeable dust buildup. I bought this kit instead of getting less expensive OEM parts from a local auto parts store because I wanted to upgrade my Subaru's braking performance, as I live part of the year in the mountains and noticed fading and vibration from the stock brakes after hard service. Hopefully the cross-drilled and slotted rotors in this kit will solve that problem. They look cool too.