This cast stainless steel downpipe is equipped with a 200-cell high-flow race catalytic converter, designed to reduce exhaust restriction and increase turbo efficiency in performance applications. The 3-inch inlet transitions to a 2.75-inch compatible connection, making it ideal for vehicles fitted with a 2.75-inch cat-back system. Specifications - Inlet Diameter: 3 inches - Outlet Compatibility: 2.75 inches - Catalyst Type: 200-cell high-flow metallic - Material: Cast stainless steel - ECU Requirement: Stage 2 remap required