Replacement manifold that is constructed from 309 Stainless Steel and come Ceramic coasted in black. Each port is larger in size and does not have the lumps that the factory OEM manifold has in each port. With both manifolds flowed on a flow bench, the AVO unit flowed 40% more. Fits original factory heat shield. Maintain the factory look along with being able to produce more power in conjunction with a larger turbocharger.