Ferrea Dual Valve Spring 2003-2007 Mitsubishi EVO 8 / 9 (QTY 16) G37_2007-2013 vf36 and vf37

vf36 and vf37

and do not require modification or re-gapping to run safely on your Mazdaspeed3

Part #: 16U-02-0900-4

By adding these billet CNC-machined mount rings

2008-2014 Subaru Impreza WRX STi Hatchback

Ferrea Dual Valve Spring 2003-2007 Mitsubishi EVO 8 / 9 (QTY 16) G37_2007-2013 vf36 and vf37Part #: 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