OEM Grade

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-578. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this 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 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. This Direct-Fit Catalytic Converter is designed to fit the 2012-2019 Jeep Grand Cherokee 6.4L. MagnaFlow 21-578 includes (1) Gasket and interchanges with OE parts 5181 677AC, 5181 677AD, 5181 677AE, 5181 677AF, 5181 677AG, 5181 677AH, 5181 677AI. 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.

Additional Information

Magnaflow OEM Grade Direct-Fit Catalytic Converter

Product Overview

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-578. 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 specifically for the 2012-2019 Jeep Grand Cherokee and interchanges with OE parts 5181 677AI and 5181 677AC, among others. 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.

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• Durable 308 stainless steel MIG welds
• Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
• Expertly Crafted To Replicate Oem-Like Flow Dynamics/Maintaining Factory Performance And Fuel Efficiency
• High Strength 16 Gauge 409 Stainless Steel Tubing For Exceptional Corrosion Resistance And Maximum Service Life
• Mandrel Bent Tubing Retains Oem-Like Design And Geometry
• Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
• OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
• Simplifies Installation With Essential Gaskets And Hardware Being Included In The Box
• Your Trusted Source For EPA-Compliant Catalytic Converters
• Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Reference Information

Catalytic Converter, Direct-Fit Catalytic Converter

MagnaFlow OEM Grade Federal/EPA Compliant direct-fit catalytic converters provide your vehicle with high-emission compliance, the latest technology, and premium-grade components. Along with those benefits, you also get their industry-leading warranties, so you can drive with confidence. MagnaFlow converters are designed to the exact original equipment specifications, while being engineered to keep the "Check Engine Light" off.

Features include:
• Stainless steel construction
• CNC-precision robotic manufacturing
• Meets or exceeds EPA emissions requirements
• Hassle-free, OE-like fitment tailored to your specific application
• Limited 5-year/50,000 mile warranty on construction
• Limited 25,000 mile warranty on emissions