{"product_id":"ap-exhaust-645128-catalytic-converter-left","title":"AP Exhaust 645128 Catalytic Converter - Left","description":"\u003ch2\u003eDirect-Fit Catalytic Converter\u003c\/h2\u003e\u003cp\u003eAP Exhaust 645128 is a direct-fit catalytic converter built for specific Isuzu NPR-HD applications. It uses a Federal \/ EPA direct-fit design with flange inlet and welded flange outlet connections for a straightforward exhaust replacement.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFederal \/ EPA direct-fit converter for application-specific exhaust service\u003c\/li\u003e\n\u003cli\u003eSingle inlet and single outlet configuration\u003c\/li\u003e\n\u003cli\u003eFlange inlet connection for secure attachment\u003c\/li\u003e\n\u003cli\u003eWelded flange outlet connection for a fixed exhaust interface\u003c\/li\u003e\n\u003cli\u003eAP Exhaust 645128 for targeted replacement use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis AP Exhaust catalytic converter is engineered for direct-fit replacement on select Isuzu NPR-HD trucks. The 645128 configuration is built around a flange inlet and welded flange outlet, which supports a clean exhaust connection without adapting the system to a universal layout. It is listed for 2020-2024 Isuzu NPR-HD, left, with Federal and California emissions coverage, and for 2025-2026 Isuzu NPR-HD, left, with state-use restrictions noted in the fitment data. If you are replacing a worn converter on an Isuzu NPR-HD, AP Exhaust 645128 provides a fitment-specific solution for the correct exhaust routing and emissions application.\u003c\/p\u003e\u003cp\u003eThis part cross-references 8975361040 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a restricted or failed catalytic converter\u003c\/li\u003e\n\u003cli\u003eRestoring exhaust flow in a direct-fit exhaust repair\u003c\/li\u003e\n\u003cli\u003eAddressing emissions-related converter service on Isuzu NPR-HD trucks\u003c\/li\u003e\n\u003cli\u003eMatching the original exhaust connection style for the listed application\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eFits 2020-2024 Isuzu NPR-HD, left. Fits 2025-2026 Isuzu NPR-HD, left. Verify emissions requirements before installation, especially for 2025-2026 applications with state restrictions noted in the fitment data. Confirm flange alignment and exhaust routing before final tightening or welding.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eAP Exhaust Direct Fit Converter is built as an application-specific replacement line for exhaust service, with direct-fit construction intended to match the listed vehicle fitment.\u003c\/p\u003e","brand":"AP Exhaust","offers":[{"title":"Default Title","offer_id":53534290116789,"sku":"BBDL-645128","price":953.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/AP_645128_Lef.jpg?v=1792130887","url":"https:\/\/www.partcatalog.com\/products\/ap-exhaust-645128-catalytic-converter-left","provider":"PartCatalog","version":"1.0","type":"link"}