Ferrea Dual Valve Spring 2003-2007 Mitsubishi EVO 8 / 9 (QTY 16) G37_2007-2013 2008-2014 Subaru Impreza WRX STi

2008-2014 Subaru Impreza WRX STi Hatchback

Starter Modification for 2015-2021 WRX models:

2008-2026 Subaru WRX

just great quality parts and guaranteed performance for your BRZ

All gauges are 2inches

Ferrea Dual Valve Spring 2003-2007 Mitsubishi EVO 8 / 9 (QTY 16) G37_2007-2013 2008-2014 Subaru Impreza WRX STiPart #: S10084 Harmonics or high frequency fatigue is present in all racing engines and will usually destroy the valvetrain if not controlled. Properly designed valve springs will control the dominant harmonics, provide the needed stability, and reduce valvetrain component wear. Ferrea valve springs are developed from high strength alloys, including premium grade chrome silicon steel. Our springs are heat treated and stress relieved, which