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: AUDI 2.0T FSI - DOHC 16 VALVE - 2006-2008 Dimensions: Valve head diameter: 6 mm Diameter (A): 22.10 mm Outer step diameter (B): - Inner step diameter (C): 16.13 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: AUDI 2.0T FSI - DOHC 16 VALVE - 2006-2008Dimensions: Head diameter: 6 mmDiameter (A): 22.10 mmOutstep diameter (B): -Instep diameter (C): 16.13 mm