Tein Street Advance Z Coilover Suspension Kit - Impreza GC6 Valvetrain and inner rim

and inner rim

and shot-peening processes together ensure that each Alpha Series Rod remains consistent and strong

The ECU analysis has been done and settings changed multiple times with the goal of further improving engine performance

2015-2021 WRX STI with VAB/VAF chassis codes

The Idle Air Control Valve

Tein Street Advance Z Coilover Suspension Kit - Impreza GC6 Valvetrain and inner rimMuch like Tein Street Basis, Street Advance utilises a twin tube system and has adjustable lowering spring seats allowing you to adjust ride height. Unlike Street Basis, it also features adjustable damping force, allowing you to effectively change your handling characteristics. Compared to mono tube suspension, Street Basis is twin tube, meaning it attains a longer stroke with a smaller repulsive force, resulting in excellent high ride comfort.