Upgrade spacer - chain tensioner for VR6 Aluminum spacer fpr VR6 Turbo upgrades Necessary when using a compression reduction plate This CNC machined spacer made of aluminum is used as a chain tensioner to give sufficient space for the compression reduction plate which is used with turbo upgrades. Technical Specification: Outer Diameter: 28,9mm Inner Diameter: 22mm Height: 11,2mm Thickness: 3,4mm The thicker the compaction reducer plate, the thicker the sleeve must be. For a 1.5mm plate with two metal gaskets (0.6mm outer layers), a 5mm sleeve should be sufficient. As a rule: Example calculation: 3mm plate and 2 metal head gaskets makes a total of 4.2mm and when compressed it is about 4mm. Multiplying this by 2 gives 8mm -> The sleeve should then be 8mm thick (with sealing rings). Without rings 6mm.