SPELAB 50mm Car Oil/Fuel/Gas Pump Mounting Bracket Single Filter Clamp Cradle Alloy Fuel Pump Bracket With the SILICONE Insulation insert provided (Shown in the pictures) the inside diameter can be either 47 mm (with the insert) or 55 mm (w/o insert) Single Bosch External Fuel Pumps Bracket. Type: Anodized Billet Aluminum Fuel Pump Mounting Bracket Keep your engine bay looking stylish and clean, with this new clamp designed for fuel filters and fuel pumps. filters and fuel pumps. Universal, But Pay Attention To Size. professional installation is recommended.