MagnaFlow Exhaust Manifold w/ California Catalytic Converter

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Fitment Info

  • Made from 100% stainless steel
  • Ceramic honeycombed catalyst
  • Seam welded close to the converter body
  • No-hassle installation
  • Federal emissions compliant design
  • 5-Year Warranty
  • Made in the USA

    Our #1 value is customer service.

    We believe in doing right by our customers, no matter what it takes.

    In keeping with that, we offer a “perfect fit guarantee” that ensures your satisfaction on 3 levels: low price, free shipping, and perfect fitment.

    - Alan Marek, Founder of

    The Lowest Price Anywhere--Guaranteed

    At PartCatalog, we’ll beat any competing vendor’s price. And we’re so confident in our rock-bottom prices that we’ll refund the difference if you find a lower price elsewhere.

    Free Shipping Both Ways

    Our “free shipping both ways” policy means that returns and orders ship free of charge. When you place an order, you pay only the list price and any applicable taxes. We cover the shipping to save you money and ensure timely delivery.

    100% Guaranteed to Fit

    In the highly unlikely event of a fitment problem, we’ll return your purchase at no cost to you. We pay return shipping on all orders, so it won’t cost you a penny to send back a defective part.


    • Exhaust manifold with integrated catalytic converter
    • Rust and oxidation resistant
    • Offers an efficient exhaust conversion and airflow
    • For a strong, tight bond
    • Gauges the performance of your cat
    • No welding, cutting or bending needed
    • Compliant in all states including California
    • Free of manufacturer’s defects and emissions failure
    • Made of high quality material and superior craftsmanship
    CARB approved Exhaust Manifold with Cat

    CARB approved Exhaust Manifold with Cat

    The Magnaflow CARB approved exhaust manifold is an exhaust header/manifold assembly. It will replace directly the OEM unit with little to no alterations required. It is available for pre-1995 and more recent models.

    Rust and oxidation resistant

    Rust and oxidation resistant

    This exhaust manifold with cat is made from 100% stainless steel body and heat shield. It's strong and resistant to rust and oxidation. This emission control device will last the life of your application.

    Efficient exhaust conversion and airflow

    Efficient exhaust conversion and airflow

    The converter holds two large ceramic honeycombed catalysts. They contain a concentration of catalytically active materials including more precious metals. This increases the volume of chemical reactions that break down harmful gases. Their large surface and a detailed coating process allow the exhaust to flow easily. MF innovative technology allows each catalyst to oxidize and reduce harmful emissions.

    Strong, tight bond

    Strong, tight bond

    A 100% stainless steel inner converter body encases the ceramic catalysts of the Magnaflow CARB approved exhaust manifold. It is seam welded to the outer stainless steel heat shield. This kind of welding forms a strong bond between the converter's components. It prevents them from becoming loose or shifting.

    Gauging your cat's performance

    Gauging your cat's performance

    Oxygen sensors are generally placed in front of the cat and behind it. On some applications, a few are plugged on the cat itself. Their role is to gauge the performance of your cat to ensure that it works great.

    Fits your car perfectly

    Fits your car perfectly

    This bolt-on part is easy to install. It is designed to fit your car perfectly. Sometimes though, welding, cutting, fabrication, and bending may be necessary for a perfect fitment. Professional installation is always recommended.

    Compliant in all states

    Compliant in all states

    The Magnaflow CARB approved exhaust manifold satisfies all California Air Resources Board and EPA standards. This means that it will get you through smog compliance in Canada and all states including California.

    5-Year Warranty

    5-Year Warranty

    On vehicles registered outside the state of California, MagnaFlow warrants the Direct Fit Catalytic Converter to be free of manufacturer’s defects for a period of 5 years and emissions failure for 25,000 miles. Direct Fit Catalytic Converters on vehicles registered in California carry a 5 year, 50,000 mile warranty against manufacturer’s defects and emissions failure.

    Made in the USA

    Made in the USA

    Made of high-quality materials in the USA, this exhaust manifold with cat has also benefited from refined manufacturing techniques. Your money funds American businesses, helps them to remain competitive and stops them from relocating to cheaper markets. You help to keep jobs in the USA.

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    This product comes with the manufacturer's limited warranty.
    Part Numbers

    The following part numbers are available in this product line:

    337301, 337302, 4451500, 4451501, 445500, 445501, 447193, 452002, 452009, 452010, 452012, 452013, 452016, 452021, 452025, 452028, 452029, 452030, 452035, 452039, 452040, 452044, 452060, 452096, 452176, 452287, 452288, 452297, 452298, 452304, 452344, 452367, 452383, 452425, 452431, 452450, 452465, 452466, 452468, 452487, 452641, 452651, 452721, 452784, 452785, 452789, 452790, 452791, 452796, 452797, 452798, 452799, 452803, 452881, 452911, 452912, 458859, 46990, 553028, 553062, 5531020, 5531052, 5531060, 5531062, 5531145, 5531153, 5531222, 5531267, 5531291, 5531293, 5531295, 5531382, 5531447, 5531692, 5531719, 5531762, 5531763, 5531802, 5531868, 5531893, 5531898, 5531919, 5531930, 553295, 553447, 553610, 553851, 553868, 553881, 553898, 553899, 553919, 5581333, 5581342, 5581548, 5581554, 5581556, 5581740, 5581781, 5581859

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