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 : mag23807 Description : Conv DF 89-92 BMW 525i 2.5L Series : Standard Anticipated Ship Out Time : Approximately 1-2 Days CARB Compliant : N Catalytic Converter Body Material : Stainless Catalytic Converter Substrate Material : Ceramic Catalytic Converter Configuration : Direct-Fit Exhaust Pipe Material : Stainless Steel Recommended Use : Converter Material : Stainless Warranty : 5 year/50,000 mile External, 2 years/25,000 miles Internal Components : Band Clamp=1 2899 : No 634 : Ceramic 3145 : Specific Catalytic Converter Overall Length : 70 California Air Board Approved : No 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 Main Piping Diameter (in.) : Stainless Steel Material : Stainless Steel Outlet Size (in.) : OE Overall Length (in.) : 70 Universal Or Specific Fit : Specific Inlet Inside Diameter (in.) : OE Outlet Outside Diameter (in.) : OE Title : DF Converter Body Length (in.) : 12 Body Width (in.) : 5.25 Catalytic Converter Format : Pre-Catalytic Converter and Main Catalytic Converter Exhaust Component Mount Type : Uses Factory Hangers Inlet Connection Type : Bolt-On Outlet Connection Type : Bolt-On/Clamp-On Oxygen Sensor Location : Pre Converter WARNING CA Proposition 65 : No 615 : 12 Exhaust Inlet Connection Type : Bolt-On Exhaust Outlet Connection Type : Bolt-On/Clamp-On California Proposition 65 : WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov Main Piping Diameter : 1.75 Catalytic Converter Air Tube Adapter : Not Air Tube Kit Adaptable Catalytic Converter Oxygen Sensor Location : Pre Converter 601 : 2.5 1172 : 2 616 : 5.25 Body Length : 12.000 in. Outlet Outside Diameter : 2 Substrate Material : Ceramic California Air Resources Board Approved : No Inlet Inside Diameter : 2.500 in. 1989-1992 BMW 525i Base L6.2494cc Exhaust, Mufflers & Tips::Catalytic Converter Direct Fit