The Power Stop Z17 Evolution rear brake pad set, part 17-2118, is a ceramic stock-replacement kit listed for the rear axle of the 18-19 Subaru WRX STi. The manufacturer says the Z17 pads use OE positive mold technology along with a thermal scorched pad surface. The manufacturer's main claims for this line are low dust and quiet operation: the pads feature a low-dust formula, validated through on-vehicle 3rd party tests in the USA, to keep your wheels looking like new. Multi-layer rubberized shims insulate noise, which is the reason to choose this set over a generic rear pad if clean wheels and a quiet daily commute matter to you.
Fitment for this part varies by model year and trim across sources, so confirm the application with the manufacturer's fitment lookup before ordering. The manufacturer also states that the kit includes premium stainless-steel hardware for a hassle-free, do-it-yourself install. Owners on user forums report that a bedding-in procedure helps after a pad change: one owner who fitted new pads and re-bedded them against the existing rotors said the vibration under heavy braking went away. Searches for rear WRX STI ceramic pads, low-dust Z17 rear pads, and STI rear brake pad and hardware kits all point to this part. If you also want fresh rotors, the manufacturer offers a Z17 Evolution Fully Coated Rotor Brake Kit that bundles pads, rotors, and hardware.
Yes. The manufacturer states that the set includes premium stainless-steel hardware for the installation.
This listing covers pads and hardware only. The manufacturer sells a separate Z17 Evolution kit that includes pads, fully coated rotors, and stainless-steel hardware.
Owners on user forums recommend bedding in new pads after installation. One owner who re-bedded new pads onto existing rotors reported that a vibration under heavy braking disappeared.
This is a bolt-on rear pad job that suits a home mechanic with basic tools. Owners on user forums list a hammer, a flat-blade screwdriver, a center punch or long pin, and long-nose pliers for the hardware and pad swap. Use the manufacturer's stainless-steel hardware, and confirm torque specifications and the correct caliper procedure in a factory service manual before you start, because torque values were not confirmed in this research. Plan to bed in the new pads afterward.
