{"product_id":"ap-exhaust-645767-catalytic-converter-front","title":"AP Exhaust 645767 Catalytic Converter - Front","description":"\u003ch2\u003eDirect-Fit Catalytic Converter for Express and Savana\u003c\/h2\u003e\u003cp\u003eAP Exhaust 645767 is a Federal \/ EPA direct-fit catalytic converter assembly built for front-position applications on select Chevrolet Express and GMC Savana vans. It uses a stainless steel body with a ceramic catalyst and OE-style dimensions for straightforward replacement on the listed vehicles.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFederal \/ EPA direct-fit catalytic converter for front exhaust placement\u003c\/li\u003e\n\u003cli\u003eStainless steel body for corrosion resistance in exhaust service\u003c\/li\u003e\n\u003cli\u003eCeramic catalyst type\u003c\/li\u003e\n\u003cli\u003eBuilt to exact OE dimensions and fitment\u003c\/li\u003e\n\u003cli\u003e4 O2 sensor ports for the listed applications\u003c\/li\u003e\n\u003cli\u003e3-bolt welded and 3-bolt spinner inlet configurations\u003c\/li\u003e\n\u003cli\u003e2-bolt welded outlet design with outlet hardware noted\u003c\/li\u003e\n\u003cli\u003eOverall length: 61 in.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Overview\u003c\/h2\u003e\u003cp\u003eAP Exhaust part number 645767 is engineered for 2018-2021 Chevrolet Express 2500, 2018-2021 Chevrolet Express 3500, 2018-2021 GMC Savana 2500, and 2018-2021 GMC Savana 3500 front applications. It is a direct-fit Y-pipe converter assembly for the listed vans, with fitment covering Federal and California emissions configurations as noted in the application data. The converter uses AP Emissions Technologies manufacturing methods and proprietary substrate chemistry to support efficient catalyst loading while maintaining OE-style fit and dimensional accuracy. This part number, 645767, is a practical replacement choice when servicing the front exhaust converter on Express and Savana platforms.\u003c\/p\u003e\u003cp\u003eThis part cross-references Monroe Shocks \u0026amp; Struts (e.g., 172286, 182286) for the same application.\u003c\/p\u003e\u003ch2\u003eWhat This Part Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFailed or inefficient front catalytic converter operation\u003c\/li\u003e\n\u003cli\u003eCheck engine light concerns related to catalyst efficiency or O2 sensor readings\u003c\/li\u003e\n\u003cli\u003eExhaust restriction caused by a damaged converter substrate\u003c\/li\u003e\n\u003cli\u003eExhaust leaks at the converter assembly connection points\u003c\/li\u003e\n\u003cli\u003eFitment issues when replacing an OE-style Y-pipe converter assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the vehicle’s emissions configuration and state restrictions before installation. This converter is listed for Federal and California emissions applications on the specified vans, but it is not for sale or use on vehicles licensed in CA, CO, ME, or NY, and restrictions may apply in other states. Confirm the front position, inlet style, outlet style, O2 sensor port count, and overall length against the original assembly before installation. Professional exhaust installation is recommended to ensure proper sealing and sensor placement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eAP Exhaust builds this converter using automated workstations, spinner welding equipment, and high-speed production lines to maintain OE dimensions and consistent fitment. The stainless steel construction and ceramic catalyst are selected for exhaust-system service on the listed Chevrolet Express and GMC Savana applications.\u003c\/p\u003e","brand":"AP Exhaust","offers":[{"title":"Default Title","offer_id":53003532435637,"sku":"BBDL-645767","price":728.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/AP_645767_Top.jpg?v=1787290188","url":"https:\/\/www.partcatalog.com\/products\/ap-exhaust-645767-catalytic-converter-front","provider":"PartCatalog","version":"1.0","type":"link"}