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Vehicle Info NeededMAGNAFLOWPART NUMBER: 642-51737
OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter 51737
$49400
Ships on 09/22/2026
Lowest Price Guarantee- Direct Fit Catalytic Converter
- 49 State
Magnaflow 51737 Features:
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51737. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. Designed to fit the 2001-2003 Mazda Protege and 2002-2003 Mazda Protege5, this direct-fit catalytic converter also interchanges with OE parts FSAG-20-600A and FSAH-20-600A, among others. Hardware is included to eliminate the hassle of working with corroded factory parts. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.
Part TypeCatalytic Converter
BrandMAGNAFLOW
Package Height8.0
Package Width10.0
Package Length44.0
Weight16.0 PG
Part CategoryPerformance Parts
Universal Or Specific FitSpecific
Outlet SizeOEM
Cat Converter Air Tube AdapterNot Air Tube Kit Adaptable
Converter Body SizeOEM
Body SizeOEM
EmissionNon-California (49-State)
Overall Length43 in (1092.2 mm)
Core Substrate MaterialOEM
MaterialStainless Steel
Catalytic Converter FormatPre-Catalytic Converter and Main Catalytic Converter
Inlet Size (In.)OE
California Air Board ApprovedNo
Substrate MaterialOEM
Exhaust Pipe MaterialStainless Steel
Exhaust Component Mount TypeUses Factory Hangers
Recommended UseConverter
Part FitmentDirect Fit
Vendor Part Number51737
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
