Nissan Skyline (HCR31) 1985-1989 - 500 Series Coilovers Spring Upgrade:Hyperco Springs Hyperco springs are available in

Hyperco springs are available in ratings from 300 lb/in-1300 lb/in

This allows more height adjustment on some McPherson applications and is less likely to come loose benefitting motorsports applications that run larger and more aggressive tire compounds

Replacement studs

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

This gives more control of driver inputs such as roll

Nissan Skyline (HCR31) 1985-1989 - 500 Series Coilovers Spring Upgrade:Hyperco Springs Hyperco springs are available inCUSTOM. 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