The Cip1 PREMIUM 32/36F Progressive 2 Barrel Carburetor Kit offers the best of performance and economy for your VW. The carburetor features a 32mm primary barrel for easy daily driving and when you step on the gas, a second 36mm barrel opens progressively for an extra boost of performance. The carburetor kit includes the 32/36F carburetor with linkage kit with electric or manual choke, a chrome air cleaner assembly with gauze filter, center section of the intake manifold (for use with single or dual port end castings), fuel line and mounting hardware. The progressive carburetor kit fits Type 1 13-1600cc upright style engines. Trimming of the intake manifold tubes and other slight modifications may be required to complete the installation. These adjustments are minor and are not a valid reason for return. The Carburetor is pre-jetted with a basic set up which will allow any size engine to fire up in seconds. Further jetting adjustments may be required based on engine size, camshaft choice and the operating altitude of your vehicle.