Holley 241 291 Holley GM Licensed Valve Cover Muscle Series SBC Holley Tensioner Assembly with Grooved Pulley LT5 97 265 Classic Chevy Holley 241 180 2 Piece Finned Valve Cover, Gen III IV LS, Natural Holley Black Finish Supercharger Belt Tensioner Assembly Holley Tensioner Assembly with grooved pulley Walmart.com. Polished Tensioner Cover for Mid Mount Accessory Drives Features and Benefits: Genuine Holley Quality Parts Details: Breather Grommets Included: No Finish: Polished Gasket Or Seal Included: No Gasket Sealant Included: No Grade Type: Performance Material: Aluminum Mounting Hardware Included: Yes Warranty: Manufacturer's Limited 90 Day Warranty