All new GSC Power-Division Single, Cylindrical Spring kit for the Subaru BRZ, Scion FRS and Toyota FT86 using the new 2.0L NA boxer engine. These are great for boosted applications or high revving NA engines needing more spring with out breaking the bank. These can handle up to 8200RPM and 20LBS of boost due to new Chromoly valve spring seats and light weight titanium retainers. 
Includes: 
16 Valve Springs 
16 Ti Retainers 
16 Spring Seats

5756 Single Spring 
93lbs @ 1.300" 
175lbs @ .400" lift

Max Boost: 20 PSI
Max RPM: 8200