This Package Includes the Following Items:
1 x Metra 99-8902 Single DIN Installation Kit for 2008-2011 Subaru Impreza / WRX / Forester Vehicles
1 x Harmony Audio HA-707552 Fits Infiniti Nissan Subaru Factory Stereo to Aftermarket Radio Harness Adapter

Metra 99-8902 Single DIN Installation Kit for 2008-2011 Subaru Impreza / WRX / Forester Vehicles:
Install dash kit for Single DIN/ISO Radios
Snap-in ISO Support System
Includes a storage pocket below the radio
Designed and manufactured with precision tolerances
Gapless fit between the dash and the kit
Painted to match factory dash color
High-grade ABS plastic construction
Factory style texture
Kit Includes: Radio Housing
ISO Brackets
ISO Trim Plate

Product Manual:

Harmony Audio HA-707552 Fits Infiniti Nissan Subaru Factory Stereo to Aftermarket Radio Harness Adapter:
Specifications:

Simply plug and play installation, no cutting required
Designed for standard audio system, premium audio may require different harness
Clearly marked color coded wires
Ideal for aftermarket radio
18 gauge high quality wire
Direct OEM fit connection