PAC SWI-PS http://www.amazon.com/PAC-SWI-PS-Universal-Steering-Interface/dp/B001EAWNVY Retails for $40. Previously installed on 2008 WRX with Pioneer Headunit. Moved that HU into my 2000, didn't need this. Sold that car. Not upgrading to a newer vehicle anytime soon. $20 local pick up in Mpls or Golden Valley (office). Also have the 2008 Metra stereo harness adapter $5 Will barter on both for labor on a diff/ATF fluid change on 2002 Outback
