Mazda RX-7 (FD3S) 1993-2002 - 500 Series Coilovers Spring Upgrade:Default Fortune Auto whereas the Concave Flow Digressive

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

all with the twist of a single adjustment knob

The Concave Flow Digressive Piston allows for a Jekyll and Hyde personality

The ultra wide range of adjustment offered by the CFD piston allows for the convenience of tuning your suspension without having to revalve your dampers

spring perches

Mazda RX-7 (FD3S) 1993-2002 - 500 Series Coilovers Spring Upgrade:Default Fortune Auto whereas the Concave Flow DigressiveCUSTOM. 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