These Mounts are made of a stiffer material then the stock mounts. These are homologated STI "Group-N" mounts. These will reduce the motion of your engine during Acceleration, Hard Cornering, and High Revving. They give you a better feel of the engine through the shifter lever and Channel more power through the drivetrain.
Constructed the same way as the OEM units, however using a much stiffer and higher quality rubber.