{"product_id":"ap-exhaust-643138-catalytic-converter-rear","title":"AP Exhaust 643138 Catalytic Converter - Rear","description":"\u003ch2\u003eDirect-Fit Converter Overview\u003c\/h2\u003e\u003cp\u003eAP Exhaust 643138 is a direct-fit catalytic converter built for exact OE dimensions and fitment. It uses a ceramic substrate and stainless steel body construction to support efficient exhaust flow and long-term durability in emissions service.\u003c\/p\u003e\u003cp\u003eCompatible With Chevrolet Impala, Buick LaCrosse, and Chevrolet Impala Limited applications where the listed rear or welded-assembly fitment applies. This AP Exhaust catalytic converter is part of the Direct Fit Converter line, which focuses on OE-style replacement geometry for straightforward installation and consistent fit.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFederal \/ EPA direct-fit design for emissions-system replacement.\u003c\/li\u003e\n\u003cli\u003eCeramic substrate material for efficient converter performance.\u003c\/li\u003e\n\u003cli\u003eStainless steel body construction for corrosion resistance.\u003c\/li\u003e\n\u003cli\u003e2-bolt welded inlet and outlet connections.\u003c\/li\u003e\n\u003cli\u003eNo O2 sensor ports.\u003c\/li\u003e\n\u003cli\u003eBuilt to OE dimensions using automated manufacturing processes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Fitment and Function\u003c\/h2\u003e\u003cp\u003eAP Exhaust 643138 is engineered for rear-position applications on 2012-2020 Chevrolet Impala, 2012-2014 Buick LaCrosse, and 2014-2016 Chevrolet Impala Limited listings shown in the fitment data. It is a direct-fit catalytic converter for vehicles that need a replacement matched to the original exhaust layout, including applications noted with Federal and California emissions or PZEV emissions requirements. The part number 643138 should be verified against the vehicle’s emissions label and the notes in the fitment table before ordering.\u003c\/p\u003e\u003cp\u003eThe Direct Fit Converter line is focused on OE-style replacement parts with manufacturing controls that help maintain consistent dimensions and fitment. AP Exhaust 643138 also cross-references 22935120 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Problems This Part Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFailed catalytic converter efficiency codes.\u003c\/li\u003e\n\u003cli\u003eExhaust leaks at the converter connection points.\u003c\/li\u003e\n\u003cli\u003eRestricted exhaust flow from a worn converter core.\u003c\/li\u003e\n\u003cli\u003eEmissions-test failure related to converter performance.\u003c\/li\u003e\n\u003cli\u003eFitment issues when replacing an OE welded assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eReview the exact fitment row for your vehicle, since some applications list rear position and others note an OE welded assembly or old body style. Confirm emissions requirements, including Federal, California, and PZEV notes, before installation. The converter uses 2-bolt welded inlet and outlet connections and does not include inlet or outlet hardware.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eAP Exhaust uses proprietary substrate chemistry and automated manufacturing equipment to produce converters built to exact OE dimensions and fitment. The 643138 part number is manufactured as a direct-fit emissions replacement for the listed applications.\u003c\/p\u003e","brand":"AP Exhaust","offers":[{"title":"Default Title","offer_id":53503698370741,"sku":"BBDL-643138","price":352.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/AP_643138_Top.jpg?v=1791610766","url":"https:\/\/www.partcatalog.com\/products\/ap-exhaust-643138-catalytic-converter-rear","provider":"PartCatalog","version":"1.0","type":"link"}