These genuine STi Group N engine mounts feature stiffer rubber for reduced engine motion, which leads to better throttle response and less driveline lash. (Yes, they do also transmit more vibration into the car. But that's a small price to pay for power, right?)
Fits all 2002-10 WRX, including STi. (Yes, they are stiffer than the stock STi mounts.) Set of two mounts.