Looking for an inexpensive replacement aluminum baseplate for you carburetor? PROFORM's new cast aluminum base plates are an inexpensive way to replace your existing plate, though we'd strongly suggest you consider upgrading to our premium billet aluminum base plates. Features include button torx head throttle plate screws, timed and full vacuum tubes for accessories and tuning, slip link mechanical secondary linkage, and power valve blow out protection! Product details: Component for use on Holley 650 CFM through 800 CFM Double Pumper with Mechanical Secondary applications, and PROFORM Carburetor Main Body, part number 67100C. Product Features:Fits Holley 4150 Models 650/700/750/800 CFM Mechanical Secondary Carburetors and PROFORM 67100C Main BodiesMade from High-Quality Cast AluminumIncludes Button Torx Head Plate Screws4-Corner Idle Compatible