Build a cleaner, better-flowing exhaust system with merge collectors and adapters engineered to bring multiple exhaust paths together or transition between different tubing sizes and components. Performance merge collectors create a smoother transition from individual header or exhaust tubes into a single outlet, helping reduce turbulence and maintain efficient exhaust flow. Shop merge collectors, collector adapters, reducers, extensions, and transition pieces for headers, race exhaust systems, engine swaps, and custom fabrication projects.