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Vehicle Info NeededMAGNAFLOWPART NUMBER: 642-23558
Standard Grade Federal / EPA Compliant Direct-Fit Catalytic Converter 23558
$60500
Ships on Sep 03, 2026
Lowest Price Guarantee- Direct Fit Catalytic Converter
- 49 State
Magnaflow 23558 Features:
MagnaFlow Standard Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 23558 helps keep the check engine light off. DIY installation is easy with the proper tools (no cutting or welding required). With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment. This direct-fit catalytic converter is designed to fit the 1981-1984 BMW 633CSi and 1983-1984 BMW 533i. The included gaskets & hardware reduce the possibility of a leaking seal while avoiding the need to reuse corroded factory parts for installation. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
Magnaflow Standard Grade Catalytic Converters
MagnaFlow Standard Grade Federal/EPA Compliant Direct-Fit Catalytic Converters help keep the check engine light off. DIY installation is easy with the proper tools (no cutting or welding required). With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter.
Part TypeCatalytic Converter
Product LineMagnaflow Standard Grade Catalytic Converters
BrandMAGNAFLOW
Package Height11.12
Package Width13.75
Package Length48.5
Weight5.0 PG
Part CategoryPerformance Parts
Converter Style3-way
Outlet QuantityTwo
EmissionNon-California (49-State)
Catalytic Converter FormatPre-Catalytic Converter and Main Catalytic Converter
Inlet Size (In.)2.25
Heat ShieldYes
Heat Shield AttachedNo
Air TubeNo
Body Length12 in (304.8 mm)
Inlet Diameter1.75 in (44.45 mm)
Inlet QuantityOne
Case MaterialStainless steel
Universal Or Specific FitSpecific
Outlet Size2 in (50.8 mm)
Cat Converter Air Tube AdapterNot Air Tube Kit Adaptable
Converter Body Size5 in. O.D.
Oxygen Sensor LocationPre and Post Converter
Body SizeOEM
Outlet Diameter1.75 in (44.5 mm)
QuantitySold individually
Overall Length69.75 in (1771.7 mm)
Core Substrate MaterialCeramic
MaterialStainless Steel
Inlet AttachmentStock flange
California LegalNo
California Air Board ApprovedNo
Substrate MaterialCeramic honeycomb
Outlet AttachmentStock flange
Exhaust Pipe MaterialStainless Steel
Exhaust Component Mount TypeUses Factory Hangers
Recommended UseConverter
Part FitmentDirect Fit
Vendor Part Number23558
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
