{"product_id":"deefill-oil-filter-adapter-13-16-16-to-1-1-8-16-sus304-stainless-cnc-machined-for-heavy-duty-seal","title":"DEEFILL Oil Filter Adapter 13\/16\"-16 to 1 1\/8\"-16, SUS304 Stainless CNC-Machined for Heavy-Duty Seal","description":"\u003cp\u003e\u003cstrong\u003eThe DEEFILL oil filter adapter converts a 13\/16\"-16 engine filter port to accept larger 1 1\/8\"-16 threaded filters like the CAT 1R-1807, in durable SUS304 stainless steel for long-term, leak-resistant service.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis precision CNC-machined adapter lets you use larger, higher-capacity oil filters without altering the engine. Made from solid SUS304 stainless bar stock, threads are cut to exact tolerances to ensure a clean seat and reliable seal under high oil pressures and elevated temperatures common in diesel and heavy-duty equipment. Install with basic hand tools in minutes and expand your filter choices to widely available 1 1\/8\"-16 models.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this adapter let me upgrade to a CAT 1R-1807 style filter?\u003c\/h3\u003e\n\u003cp\u003eThe adapter replaces the smaller factory female thread with a robust external 1 1\/8\"-16 threaded surface so you can screw on larger aftermarket or OEM filters. There’s no machining of the engine required — simply thread the adapter onto the existing 13\/16\"-16 port and tighten to spec.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConverts 13\/16\"-16 engine port to 1 1\/8\"-16 filter thread\u003c\/li\u003e\n  \u003cli\u003eFits CAT 1R-1807 and many equivalent filters (Baldwin, NAPA, WIX, FRAM, etc.)\u003c\/li\u003e\n  \u003cli\u003eInstall by hand then snug with a wrench — no permanent engine modifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this hold up to diesel engine oil pressure and heat?\u003c\/h3\u003e\n\u003cp\u003eYes — the adapter is CNC-machined from SUS304 stainless steel to resist corrosion, galling, and deformation under high temperatures and sustained oil pressure. Unlike cheap cast adapters, solid bar-stock machining eliminates internal voids and soft spots that lead to premature failure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSUS304 stainless resists rust and oil-related corrosion\u003c\/li\u003e\n  \u003cli\u003ePrecision threads provide reliable, leak-free engagement\u003c\/li\u003e\n  \u003cli\u003eDesigned for heavy-duty and diesel applications (Duramax, CAT, Volvo, AGCO)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich engines and filters is this compatible with?\u003c\/h3\u003e\n\u003cp\u003eThe adapter is built for any engine with a 13\/16\"-16 female filter port that you want to convert to accept a 1 1\/8\"-16 filter. It's known to suit Duramax installations and is compatible with widely-used replacement filters such as CAT 1R-1807, VOLVO 478736, AGCO AG121853, BALDWIN B7225, and NAPA 7791.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCheck your current port thread: must be 13\/16\"-16 before ordering\u003c\/li\u003e\n  \u003cli\u003eAccepts any 1 1\/8\"-16 threaded oil filter\u003c\/li\u003e\n  \u003cli\u003eCommon compatible part numbers listed on the product page\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow simple is installation and what tools are required?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward and designed for DIY mechanics: thread the adapter onto the engine port by hand and finish tightening with a standard wrench. No specialty tools, welding, or engine disassembly are necessary — most jobs complete in minutes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHand-thread onto 13\/16\"-16 port, then snug with a wrench\u003c\/li\u003e\n  \u003cli\u003eNo engine modification or machining needed\u003c\/li\u003e\n  \u003cli\u003eOne-piece adapter included in the package\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The DEEFILL adapter is for owners and technicians who want to upgrade filtration capacity on diesel, commercial, agricultural, or heavy-equipment engines that use a 13\/16\"-16 filter port. If you need to fit larger 1 1\/8\"-16 filters such as CAT 1R-1807 or equivalent models — for increased media volume and longer service intervals — but don’t want permanent changes to the engine, this stainless-steel, CNC-machined adapter provides a durable, easy-to-install solution. Always verify your engine’s port thread size is 13\/16\"-16 before purchase.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this adapter fit my Duramax engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: If your Duramax has a 13\/16\"-16 filter port, yes — this adapter converts it to accept 1 1\/8\"-16 filters like CAT 1R-1807.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What material is the adapter made from?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The adapter is CNC-machined from solid SUS304 stainless steel for corrosion resistance and long-term durability.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DEEFILL","offers":[{"title":"Default Title","offer_id":48085872083102,"sku":"B0GHDFH17N","price":42.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/deefill-front-view-adapter.jpg?v=1785878797","url":"https:\/\/northtrailauto.ca\/products\/deefill-oil-filter-adapter-13-16-16-to-1-1-8-16-sus304-stainless-cnc-machined-for-heavy-duty-seal","provider":"North Trail Auto","version":"1.0","type":"link"}