4-Port Cylinder Head Exhaust Manifold Inox Adapter Kit EA888.3Our team thinks ahead for you. Recognizing the need for improvement in the EA888. 3 engine and enhancing the cylinder head with four intake ports through advanced flow dynamics, we deemed it necessary to provide a solution for all of you planning this upgrade. We designed and manufactured a stainless steel adapter plate using our CNC machines, featuring larger exhaust ports that transition from a square shape on the head side to an oval shape. This