Universal Turbo Exhaust Ring 4.0 Inch For Garrett Gt42/45/5 And Gt4094 Turbos (516210040)Description Turbine Discharge Flanges Garrett Turbo 4 Inch 45 series from PPE. Adapt to standard exhaust tubing size. Makes your custom exhaust more reliable. Available Sizes: Features 4 Inch 45 Series Makes your custom exhaust more reliable Exhaust rings for Garrett GT42 45 55 and GT4094 Adapt to standard exhaust tubing size