Differential Cover Differential Cover; Polished Finned Aluminum; Incl. Differential Cover/Gasket/12 Gold Iridite Allen Head Bolts; SPECIFICATIONS: Finish: Polished Position: N/A Gaskets Included: Yes FEATURES: Polished Aluminum Finned Design 12 Bolt Engineered For Optimum Fit And Function Spectre's Polished Aluminum 12 bolt Differential Cover features a finned design ensuring they look as good as they perform. Includes 12 SAE standard chrome bolts for installation. You'll need to supply your own bolts if your vehicle requires metric bolts. Manufactured using high quality materials, this product is engineered for optimum fit and function. Spectre Performance, a leading manufacturer of performance racing auto parts.