The Caster Adjustment Bushing system does just that, increases the caster up front slightly, and also replaces the big, squishy tennis ball that the front suspension pivots on with a harder polyurethane bushing. The increased caster will help both turn-in and straight line stability.
Applied Models:
Impreza WRX 5-door: 2008+ [2.5-liter turbocharged]
Impreza WRX 4-door: 2008+ [2.5-liter turbocharged]
Impreza 2.5i 5-door: 2008+ [2.5-liter naturally aspirated]
Impreza 2.5i 4-door: 2008+ [2.5-liter naturally aspirated]
Impreza WRX STI 5-door: 2008-2010 [2.5-liter turbocharged]
Legacy sedan: 2005-2009 [all models]
Legacy wagon: 2005-2009 [all models]
Legacy Spec B: 2005-2009 [all models]
Legacy Outback: 2005-2009 [all models]
Legacy 3.0R: 2005-2009 [3.0-liter Flat Six]
Forester 2.5XT: 2009+ [2.5-liter turbocharged]
Forester 2.5X: 2009+ [2.5-liter naturally aspirated]
BRZ & FRS: 2012+