Kelford Cams EJ20/EJ25 WRX STi (All Versions) Ferrea Intake Valve Set
Ferrea Comp Plus +1mm Intake 37mm 5.97mm 104.44mm 3.5mm for Subaru
Kelford's have been using Ferrea valves for the last 25 years. Ferrea Racing Components are world leaders in valve technology.