Designed for IDF, DRLA, and HPMX carburettors Supplied in pairs with hardware and gaskets included Increases power, improves throttle response, and enhances fuel economy Perfect for most popular VW applications These offset CB performance manifolds are designed to fit IDF, DRLA, and HPMX carburettor's, providing an excellent upgrade for your VW engine. Sold in pairs, the manifolds come with all necessary hardware and gaskets for easy installation. By optimising airflow, these manifolds can increase engine power, deliver quicker throttle response, and, believe it or not, even improve gas mileage when properly installed with dual carburettors.