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APEXi EXV Front Roll Center Adjuster for 1992-2000 Subaru Impreza WRX STI (GC/GF/GM) bc_id-1549050511394 2015 Porsche 911 Turbo (991)The APEXi EXV Front Roll Center Adjuster for the 1992 2000 Subaru Impreza WRX STI (GC GF GM) corrects the front suspension geometry changes introduced when lowering on coilovers. When you lower the car, the suspension's roll center drops compromising handling precision and creating unwanted geometry changes. The EXV RCA restores the factory roll center height at your new ride height, bringing back proper suspension response and handling linearity. The