Front Roll Center Adjuster Kit

The Tomioka Racing Roll Center Adjuster (TR-CS2004) is engineered to restore proper suspension geometry for lowered Subaru vehicles. When a car's center of gravity is lowered, the front roll center drops, which can lead to increased roll couple and less effective front tire loading during cornering. This kit features extended-height lower ball joints that precisely correct the roll center, ensuring the front tires are loaded more evenly. This results in improved steering response and a more stable, planted feel, particularly noticeable when equipped with performance tires. This kit includes two extended lower ball joints, two pins (including cotter pins), and necessary hardware, featuring the black cone found under the castle nut. For a complete geometry optimization on a lowered vehicle, including correction of bump steer, it is recommended to add extended tie-rod ends. Professional alignment is required after installation. The TR Roll Center Adjuster is compatible with a wide range of Subaru models, including Impreza, WRX, STI (GC/GF/GM 1992–2000; GD/GG 2001–2006; GE/GR 2007–2013; GP/GJ 2012–2017; VA 2014–2021), Legacy and Outback (BD/BG/BK 1995–1998; BE/BH/BT 1998–2002; BL/BP 2003–2008; BM/BR 2009–2014), Forester (SF 1997–2002; SG 2003–2008; SH 2008–2013; SJ 2013–2018; SK 2018–2023), Levorg VM (2014–2020), and XV/Crosstrek (GP 2012–2017 / GT 2017–2022). Compatibility notes also indicate that an alignment is required post-installation, and while the ball joints correct roll center, bump steer correction requires the addition of extended tie-rod ends. Installation may also benefit from replacing the knuckle-to-ball-joint pinch bolt, which is available as an add-on.