Rally Road - M50 Manifold Adapter Flange and Fuel Rail Spacer Kit (RRMAFAFRSK)Even if you purchase another manifold adapter kit, you will want these basic parts to complete the conversion. The stainless flange adapts the OBDII throttle body to the M50 intake manifold and is sandwiched between the rubber gaskets on each piece. The smaller stainless pieces will allow the OBDII stainless fuel rail to the M50 intake manifold mounting points. It's a very clean solution and ensures a safe and secure mounting of your fuel rail.