CARBURETOR CONVERSION KIT Genuine Weber carbs are NEW, not rebuilt! Replaces old carb for better performance, improved fuel economy Includes everything needed for an easy conversion and direct, bolt-on installation Designed for street use These Weber Carburetor Conversion Kits are precalibrated based on use with a stock engine in YOUR specific vehicle. If your engine has been modified, recalibration may be required. Kit components vary by application. Please note: These carburetors require only 2-1/2 to 3 lbs. of fuel pressure; you may need a new fuel pressure regulator if your vehicle has higher or inconsistent fuel pressure. CHECK LOCAL EMISSION LAWS PRIOR TO ORDERING.