Kelford Cams Dual Valve Spring and Titanium Retainer Kit Subaru FA20F WRX 15+

Subaru WRX 2015+ dual spring and titanium retainer kit is to suit turbocharged FA20 engines. 88lb seat pressure at 32.85mm installed height using the OEM spring base. 228lb at 11.0mm valve lift. 262lb at 12.0mm valve lift. Coil bind (solid spring height) 18.55mm. This spring kit can be used for engines running to 9750RPM and 50PSI boost! High frequency dual spring design to reduce spring surge at high operating RPM. Made with the highest quality Japanese spring steel and wound in USA by PAC Racing who are world leaders in racing valve spring design and manufacture. Made with advanced heat treatment processing and surface finishing techniques (nano peening) to extend fatigue life.Titanium retainers made in-house at Kelford Cams with our brand new high precision CNC turning centers. Parts suitable for: Toyota 4AU-GSE variant of the engine found in the GT86. FA20 variants found in Subaru BRZ, Levorg, Legacy and Forester.