These OEM replacement Radium Engineering gaskets press into the lower intake manifold ports and seal to the upper intake manifold. They are compatible with many Audi/Lamborghini engines including the 5.2L V10 engine found in the Audi R8 (Type 42) and Lamborghini Gallardo LP. They are NOT compatible with the later Audi R8 (Type 4S) and Lamborghini Huracan. As shown below, these gaskets are used in the Radium Engineering Port Injection Kit.NOTE: 18-0090 INCLUDES 1 GASKET ONLY. A TOTAL OF QUANTITY 10 ARE REQUIRED IF REPLACING ALL GASKETS.