Replacement Damper VVT Cast Iron Damper for Gen III Hemi Mid-Mount Accessory Drive System VVT Black Finish HolleyFits Accessory Drive System 20 291, 20 291BK, 20 293, and 20 293BK on 2009 Up 5. 7L and 2011 Up 6. 4L Engines Features and Benefits: Replacement Damper for Mid Mount Accessory Drive Systems 20 291, 20 291BK, 20 293, and 20 293BK Overall Height: 4. 76 inches Fits Vvt Engines Associated Comments: This Damper is for Use with the Holley Mid Mount Accessory Drive System Only. The Pulley Spacing is Different than Stock and Cannot be used in Factory