A wide range of Ferrea handles is available on the American and European market. We currently offer four different types of retainers to choose from: titanium steel, lightweight steel, steel and aluminum retainers, all CNC machined to perfection and offering excellent strength and stability. Fits: SUBARU WRX 2.0L - DOHC 16 VALVE (EJ20) - 2001-2008 Dimensions: Valve head diameter: 6 mm Diameter (A): 25.40 mm Outer step diameter (B): - Inner step diameter (C): 15.70 mm The wide range of Ferrea retainers is available on the US and European market. We currently offer four different types of retainers to choose from: titanium steel, light steel, steel and aluminum retaining components, all of which are CNC machined to perfection and offer excellent strength and stability. Fits: SUBARU WRX 2.0L - DOHC 16 VALVE ( EJ20) - 2001-2008Dimensions: Head diameter: 6 mmDiameter (A): 25.40 mmOutstep diameter (B): -Instep diameter (C): 15.70 mm