Unlock Larger, Higher-Flow Oil Filters for Better Engine Protection - Running a 13/16"-16 threaded filter port and want to upgrade to the superior CAT 1R-1807 or compatible 1 1/8"-16 filters? This oil filter adapter converts your 13/16"-16 engine port to accept any 1 1/8"-16 threaded oil filter, giving you access to a larger filter with greater oil capacity, more filter media, and improved filtration performance — without any permanent modification to your engine. A simple, effective upgrade for Duramax diesel and compatible applications.
Wide Compatibility - This adapter is a direct fit replacement for: Duramax CAT 1R-1807 / 1R1807; VOLVO 478736, 85114049; AGCO AG121853; BALDWIN B7225, B7700; NAPA 7791; WIX 57791; CARQUEST 84791; FRAM PH9376, PH9376FP; LUBER-FINER LFP3236; FLEETGUARD LF3973; MACK 20539275, 2191P551807, 485GB3236; VMC LF551807. Compatible with any oil filter using 1-1/8"-16 threads.
SUS304 Stainless Steel, CNC Precision Machined - Most adapters on the market are cast from unspecified alloys that corrode under heat and oil pressure. This one is CNC-machined from solid SUS304 stainless bar stock — every thread cut to exact tolerance and mating surface perfectly flat. No casting voids, no soft spots, no rust, no seizing.
Straightforward Installation - Thread the adapter onto your existing 13/16"-16 engine filter port by hand, then snug it with a wrench. Easy Installation, no professional shop required. The precision-machined SUS304 threads seat cleanly and seal reliably, ensuring leak-free performance from first install.
Ideal for Duramax Diesel Upgrades, Agricultural, Commercial & Heavy Equipment Applications - Whether you're upgrading your GM 6.6L Duramax diesel for better oil filtration, maintaining CAT-powered heavy equipment, servicing VOLVO commercial trucks, or working on AGCO agricultural machinery, this adapter gives you the filtration flexibility your equipment deserves. Built to handle the high oil pressure and thermal demands of diesel and heavy-duty applications. If you're not certain about fitment, check your current filter port thread size — 13/16"-16 in, 1 1/8"-16 out.
Package Include: 1pcs 13/16"-16 to 1 1/8"-16 Oil Filter Adapter
Description
This 13/16"-16 to 1 1/8"-16 oil filter adapter is the simplest way to unlock access to larger 1 1/8"-16 threaded filters — including the CAT 1R-1807 and all compatible equivalents - without modifying your engine. CNC-machined from solid SUS304 stainless steel for precise fitment and long-term corrosion resistance. Threads seat cleanly, seal reliably, and hold under sustained oil pressure and heat. Install in minutes with standard hand tools. Compatible with Duramax, CAT 1R-1807, VOLVO 478736, AGCO AG121853, BALDWIN B7225, NAPA 7791, and any filter with 1 1/8"-16 threads. Verify your engine's existing port thread size is 13/16"-16 before purchase.
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