Lexus IS250/IS350 (GSE20) RWD Only 2006-2012 - 500 Series Coilovers Spring Upgrade:Swift Springs since you will now enjoy

since you will now enjoy the benefits and adjustability of a true race setup while not experiencing frequent and harsh spring binding noise

whereas the Concave Flow Digressive Technology has a broad range of 8kg spring rates

if you have other custom spring rate preferences

PROGRESS NEVER STOPS

Lexus IS250/IS350 (GSE20) RWD Only 2006-2012 - 500 Series Coilovers Spring Upgrade:Swift Springs since you will now enjoyCUSTOM. MODULAR. REBUILDABLE. Fortune Auto engineers are consistently chasing improvement and the development of the Generation 8 500 series damper is no exception. The 500 Series single adjustable coilover is the entry into the Fortune Auto verse. Utilizing the highly advanced, High Flow Digressive Piston to optimize the perfect balance between performance and comfort along with the ability to upgrade and rebuild; youll never have to buy coilovers