Supertech SPRK-100 valve spring set fits Toyota GT86 & Subaru BRZ FA20

Sport valve spring set from Supertech made of high quality tempered steel with titanium spring plates for all FA20 Boxer engines.These valve springs have an extra adjusted spring rate.- Better and faster response- Higher engine speed possible- Lighter valve train due to titanium retainers- Absolutely stable for high rpm Outer spring external diameter:30,20mmOuter spring internal diameter:22,20mmInner spring external diameter:22,20mmInner spring internal diameter:16,80mmPressure valve seat:39,46kg/33,5mmPressure seat:96,16kg/10mmMax. lift:15,00mmCoil bind (under stress):18,50mmRate in lbs./mm:12,50Includedinkit: Outer spring external diameter: Outer spring internal diameter: Inner spring external diameter: Inner spring internal diameter Pressure valve seat Pressure seat Max. lift: Coil bind (under stress) Rate in lbs./mm: in 16 valve springs Spring retainer titanium top Spring retainer steel bottom