Subaru Impreza WRX STI (GDB) 2004 - 510 Series Coilovers Spring Upgrade:Hyperco Springs Research on the racetrack has

Research on the racetrack has helped us develop the Fortune Auto 500 Series into a great all-around shock absorber

Concave Flow Digressive Piston Technology™

while higher spring rates feel much smoother

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Subaru Impreza WRX STI (GDB) 2004 - 510 Series Coilovers Spring Upgrade:Hyperco Springs Research on the racetrack hasCUSTOM. MODULAR. REBUILDABLE. Fortune Auto engineers are consistently chasing improvement and the development of the Generation 8 510 Series damper is no exception. The 510 Series single adjustable coilover is a remarkably sophisticated damper system. Utilizing the highly advanced, Concave Flow Digressive Piston to provide an incredibly dynamic adjustment range along with the ability to upgrade and rebuild; youll never have to buy coilovers again. AT