SKYLINE EMISSIONS
Skyline Emissions specializes in the design, development, and manufacture of a complete line of aftermarket diesel particulate filters (DPF), and diesel oxidation catalysts (DOC), including clamps and gaskets for heavy-duty and medium-duty on-highway diesel applications including heavy-duty trucks, medium-duty trucks, school buses, motor coaches, and shuttle buses.
Developed by an engineering team with decades of diesel emissions control experience, Skyline DPFs and DOCs combine Exact-Fit™ design with exceptional quality and extensive performance testing. Skyline means greater value because our design, state-of-the-art manufacturing, rapid shipping, and testing capability have resulted in durable DOCs and DPFs with extended service life. Our wide-ranging line of DOCs and DPFs – more than 160 parts and growing – are built to last and will keep your fleet running with lower operating costs. Skyline Emissions products are sold through distributors all across the United States and Canada.
Designed and Manufactured in the U.S.A.
We do have a broad range of OEM filters that are available in California.
Skyline DPFs / DOCs (3)
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{"id":9473102741745,"title":"Skyline OEM Replacement DOC for Paccar PX-9+ ISL9 (4353296 \/ LJ0431-C)","handle":"skyline-oem-replacement-doc-for-paccar-px-9-isl9-4353296-lj0431-c","description":"\u003cp\u003e\u003cstrong\u003eSkyline OEM DOC Replacement for Cummins ISL9 and Paccar PX9 (LJ0431-C)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplaces OEM numbers:\u003cspan\u003e 4353296, 4353296NX, 4353296RX, A047V497, 5300521, 5300521NX, A041R344, 5287615, 5287615NX, A035J040\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eIncludes the required gaskets and clamps!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEach Skyline DPF \/ DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ approach makes installation fast and easy without cutting or welding to get you back on the road.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eSkyline Emissions filters are designed and manufactured in the USA, and ship from several warehouses across the USA. These DOCs and DPFs come with a three-year, unlimited mileage warranty from the manufacturer.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eNote: This product cannot be sold or shipped to CA at the present time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","published_at":"2026-02-11T14:27:35-08:00","created_at":"2026-02-11T14:27:34-08:00","vendor":"Skyline","type":"Skyline DOCs","tags":["Cummins","DOC","Heavy Duty","ISL","Paccar","PX-9","ship-flat50"],"price":246722,"price_min":246722,"price_max":246722,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":47799719592177,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"SKYLJ0431-C","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Skyline OEM Replacement DOC for Paccar PX-9+ ISL9 (4353296 \/ LJ0431-C)","public_title":null,"options":["Default Title"],"price":246722,"weight":0,"compare_at_price":null,"inventory_quantity":0,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/Skyline-LJ0431-DOC.webp?v=1771277979"],"featured_image":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/Skyline-LJ0431-DOC.webp?v=1771277979","options":["Title"],"media":[{"alt":null,"id":38464563642609,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1600,"width":1600,"src":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/Skyline-LJ0431-DOC.webp?v=1771277979"},"aspect_ratio":1.0,"height":1600,"media_type":"image","src":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/Skyline-LJ0431-DOC.webp?v=1771277979","width":1600}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e\u003cstrong\u003eSkyline OEM DOC Replacement for Cummins ISL9 and Paccar PX9 (LJ0431-C)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplaces OEM numbers:\u003cspan\u003e 4353296, 4353296NX, 4353296RX, A047V497, 5300521, 5300521NX, A041R344, 5287615, 5287615NX, A035J040\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eIncludes the required gaskets and clamps!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEach Skyline DPF \/ DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ approach makes installation fast and easy without cutting or welding to get you back on the road.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eSkyline Emissions filters are designed and manufactured in the USA, and ship from several warehouses across the USA. These DOCs and DPFs come with a three-year, unlimited mileage warranty from the manufacturer.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eNote: This product cannot be sold or shipped to CA at the present time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e"}
Skyline OEM Replacement DOC for Paccar PX-9+ ISL9 (4353296 / LJ0431-C)
$2,467.22
Skyline OEM DOC Replacement for Cummins ISL9 and Paccar PX9 (LJ0431-C) Replaces OEM numbers: 4353296, 4353296NX, 4353296RX, A047V497, 5300521, 5300521NX, A041R344, 5287615, 5287615NX, A035J040 Includes the required gaskets and clamps! Each Skyline DPF / DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ appro...
{"id":7971328753905,"title":"Skyline OEM replacement DOC for Cummins ISL9 \/ Paccar PX-9 (4353305 \/ LJ0430)","handle":"skyline-oem-replacement-doc-for-cummins-isl9-paccar-px-9-4353305-lj0430","description":"\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSkyline OEM DOC Replacement for \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eCummins ISX\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e (LJ0430-C\u003c\/span\u003e)\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eEach Skyline DPF \/ DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ approach makes installation fast and easy without cutting or welding to get you back on the road.\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eSkyline Emissions filters are designed and manufactured in the USA, and ship from several warehouses across the USA. These DOC's and DPF's come with a three year, unlimited mileage warranty from the manufacturer.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eReplaces OEM numbers:\u003cspan data-mce-fragment=\"1\"\u003e \u003cb data-mce-fragment=\"1\"\u003e \u003c\/b\u003e\u003cstrong\u003e4353305, 4353305NX, 4353305RX, A047V506, 5301516, 5301516NX, A041W272, 5303019, 5303019NX, A042P967\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eIncludes the required clamps and gaskets ! \u003cspan data-mce-fragment=\"1\"\u003e (S\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eold each, Picture for reference only.)\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNote: This product cannot be sold or shipped to CA at the present time.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","published_at":"2023-07-21T10:50:52-07:00","created_at":"2023-07-21T10:49:23-07:00","vendor":"Skyline","type":"Skyline DOCs","tags":["Cummins","DOC","Heavy Duty","ISL","Paccar","PX-9","ship-flat50","Skyline"],"price":212300,"price_min":212300,"price_max":212300,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":43878647759089,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"SKYLJ0430-C","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Skyline OEM replacement DOC for Cummins ISL9 \/ Paccar PX-9 (4353305 \/ LJ0430)","public_title":null,"options":["Default Title"],"price":212300,"weight":0,"compare_at_price":null,"inventory_quantity":0,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/SkylineLJ0430DOC_sqnowm_t.jpg?v=1689961765"],"featured_image":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/SkylineLJ0430DOC_sqnowm_t.jpg?v=1689961765","options":["Title"],"media":[{"alt":null,"id":31753151185137,"position":1,"preview_image":{"aspect_ratio":1.0,"height":850,"width":850,"src":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/SkylineLJ0430DOC_sqnowm_t.jpg?v=1689961765"},"aspect_ratio":1.0,"height":850,"media_type":"image","src":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/SkylineLJ0430DOC_sqnowm_t.jpg?v=1689961765","width":850}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSkyline OEM DOC Replacement for \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eCummins ISX\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e (LJ0430-C\u003c\/span\u003e)\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eEach Skyline DPF \/ DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ approach makes installation fast and easy without cutting or welding to get you back on the road.\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eSkyline Emissions filters are designed and manufactured in the USA, and ship from several warehouses across the USA. These DOC's and DPF's come with a three year, unlimited mileage warranty from the manufacturer.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eReplaces OEM numbers:\u003cspan data-mce-fragment=\"1\"\u003e \u003cb data-mce-fragment=\"1\"\u003e \u003c\/b\u003e\u003cstrong\u003e4353305, 4353305NX, 4353305RX, A047V506, 5301516, 5301516NX, A041W272, 5303019, 5303019NX, A042P967\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eIncludes the required clamps and gaskets ! \u003cspan data-mce-fragment=\"1\"\u003e (S\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eold each, Picture for reference only.)\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNote: This product cannot be sold or shipped to CA at the present time.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e"}
Skyline OEM replacement DOC for Cummins ISL9 / Paccar PX-9 (4353305 / LJ0430)
$2,123.00
Skyline OEM DOC Replacement for Cummins ISX (LJ0430-C) Each Skyline DPF / DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ approach makes installation fast and easy without cutting or welding to get you back on the road. Skyline Emissions filters are designed and manufactured in the USA, and ship from sever...
{"id":7970978496753,"title":"Skyline Replacement DOC for Cummins ISL9 \/ Paccar PX-9 (4353304 \/ LJ0413-C)","handle":"skyline-replacement-doc-for-cummins-isl9-paccar-px-9-4353304-lj0413-c","description":"\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSkyline OEM DOC Replacement for \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eCummins ISX\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e (LJ0413-C\u003c\/span\u003e)\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eEach Skyline DPF \/ DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ approach makes installation fast and easy without cutting or welding to get you back on the road.\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eSkyline Emissions filters are designed and manufactured in the USA, and ship from several warehouses across the USA. These DOC's and DPF's come with a \u003cspan style=\"color: #ff8000;\"\u003ethree year, unlimited mileage warranty from the manufacturer.\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eReplaces OEM numbers:\u003cspan data-mce-fragment=\"1\"\u003e 4353304, 4353304NX, 4353304RX, A047V505, 5302769, 5302769NX, A042M251\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eIncludes the needed Clamps and Gaskets! \u003cspan data-mce-fragment=\"1\"\u003e (S\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eold each, Picture for reference only.)\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNote: This product cannot be sold or shipped to CA at the present time.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","published_at":"2023-07-21T10:51:44-07:00","created_at":"2023-07-20T09:41:31-07:00","vendor":"Skyline","type":"Skyline DOCs","tags":["Cummins","DOC","Heavy Duty","ISL","L9","Paccar","PX-9","ship-flat50","Skyline"],"price":173400,"price_min":173400,"price_max":173400,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":43877606949105,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"SKYLJ0413-C","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Skyline Replacement DOC for Cummins ISL9 \/ Paccar PX-9 (4353304 \/ LJ0413-C)","public_title":null,"options":["Default Title"],"price":173400,"weight":0,"compare_at_price":null,"inventory_quantity":0,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/SkylineLJ0413DOC_sqnowm_t.jpg?v=1689871292"],"featured_image":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/SkylineLJ0413DOC_sqnowm_t.jpg?v=1689871292","options":["Title"],"media":[{"alt":null,"id":31748876108017,"position":1,"preview_image":{"aspect_ratio":0.999,"height":850,"width":849,"src":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/SkylineLJ0413DOC_sqnowm_t.jpg?v=1689871292"},"aspect_ratio":0.999,"height":850,"media_type":"image","src":"\/\/www.dpfpartsdirect.com\/cdn\/shop\/files\/SkylineLJ0413DOC_sqnowm_t.jpg?v=1689871292","width":849}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSkyline OEM DOC Replacement for \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eCummins ISX\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e (LJ0413-C\u003c\/span\u003e)\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eEach Skyline DPF \/ DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ approach makes installation fast and easy without cutting or welding to get you back on the road.\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eSkyline Emissions filters are designed and manufactured in the USA, and ship from several warehouses across the USA. These DOC's and DPF's come with a \u003cspan style=\"color: #ff8000;\"\u003ethree year, unlimited mileage warranty from the manufacturer.\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eReplaces OEM numbers:\u003cspan data-mce-fragment=\"1\"\u003e 4353304, 4353304NX, 4353304RX, A047V505, 5302769, 5302769NX, A042M251\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eIncludes the needed Clamps and Gaskets! \u003cspan data-mce-fragment=\"1\"\u003e (S\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eold each, Picture for reference only.)\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNote: This product cannot be sold or shipped to CA at the present time.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e"}
Skyline Replacement DOC for Cummins ISL9 / Paccar PX-9 (4353304 / LJ0413-C)
$1,734.00
Skyline OEM DOC Replacement for Cummins ISX (LJ0413-C) Each Skyline DPF / DOC is specifically designed as a direct replacement for the OEM filter. Our Exact-Fit™ approach makes installation fast and easy without cutting or welding to get you back on the road. Skyline Emissions filters are designed and manufactured in the USA, and ship from sever...
