MagnaFlow Direct-Fit Catalytic Converters are designed for easy bolt-on installation for the Professional Installer. Each is designed to exact the original equipment specifications. While the majority of the Direct-Fit Catalytic Converter products do not require welding; cutting or bending; limited applications may require additional welding for optimal installation. PartNumber : mag23545 Description : Conv DF 90 Porsche 911 2.3L CAT Converter Air Tube Adapter : Not Air Tube Kit Adaptable Converter Body Size : OEM Core Substrate Material : OEM Emission : Non-California (49-State) Inlet Size (in.) : OE Material : Stainless Steel Outlet Size (in.) : OE Overall Length (in.) : OEM Inlet Inside Diameter (in.) : OE Outlet Outside Diameter (in.) : OE WARNING CA Proposition 65 : No Catalytic Converter Air Tube Adapter : Not Air Tube Kit Adaptable Outlet Outside Diameter : OE Inlet Inside Diameter : OEM 1990-1994 Porsche 911 Carrera 2 H6.3606cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1990-1994 Porsche 911 Carrera 4 H6.3606cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1993-1994 Porsche 911 RS America H6.3606cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1994 Porsche 911 Speedster H6.3606cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1993-1994 Porsche 911 Turbo 3.6 H6.3606cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit