Fits 5-1/8in and 4-7/32in Carb Necks. Has recessed base for low profile fit over carburetor. Includes 4-7/32in Adapter, 2 Plated Studs, Tri-Star Wing Nut, PCV Attachment for use on Pollution Controlled V ehicles, 3in Paper Filter and Installation Instructions. Product Features:Center Nut Style Air CleanerChrome Finish14-inch DiameterIncludes 4-7/32 -inch Adapter, 2 Plated Studs, Tri-Star WIng Nut & Installation InstructionsFits 5-1/8 -inch & 4-7/32 -inch Carb Necks