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 off the Direct-Fit Catalytic converter products do not require welding; cutting or bending; limited applications may require additional welding for optimal installation. PartNumber : mag337367 Description : Conv DF 83-91 Ford/Linc/Merc D/S CA CAT Converter Air Tube Adapter : Air Tube Pre-Installed Converter Body Size : OEM Core Substrate Material : OEM Emission : California 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 California Proposition 65 : No WARNING CA Proposition 65 : No Catalytic Converter Air Tube Adapter : Air Tube Pre-Installed Outlet Outside Diameter : OE Inlet Inside Diameter : OEM 1987-1991 Ford Country Squire Base V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1987-1991 Ford Country Squire LX V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1987-1991 Ford LTD Crown Victoria Base V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1987-1991 Ford LTD Crown Victoria LX V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1987-1991 Ford LTD Crown Victoria S V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1987-1991 Mercury Colony Park GS V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1987-1991 Mercury Colony Park LS V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1986 Mercury Grand Marquis Base V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1986 Mercury Grand Marquis Colony Park V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1987-1991 Mercury Grand Marquis GS V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit 1986-1991 Mercury Grand Marquis LS V8.-cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit