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Description
LF3973 FLEETGUARD OIL FILTER KWTechnical Specifications Part Type Lube Filter, Spin On (Full Flow) Part Number Fleetguard LF3973 Media Type Cellulose Thread Size 1 1 8 16 UNF 2B Length 10. 39 inch (263. 91 mm) Largest OD 4. 24 inch (107. 59 mm) Gasket OD 3. 94 inch (99. 95 mm) Gasket ID 3. 56 inch (90. 55 mm) Efficiency 95% @ 30 Microns (SAE J1858) Rated Flow 17. 17 gpm (65. 00 L min) Notes Standard cellulose spin on. For premium synthetic upgrade, use LF3379 or LF9667. Cross
Technical Specifications
| Part Type | Lube Filter, Spin-On (Full-Flow) |
| Part Number | Fleetguard LF3973 |
| Media Type | Cellulose |
| Thread Size | 1 1/8-16 UNF 2B |
| Length | 10.39 inch (263.91 mm) |
| Largest OD | 4.24 inch (107.59 mm) |
| Gasket OD | 3.94 inch (99.95 mm) |
| Gasket ID | 3.56 inch (90.55 mm) |
| Efficiency | 95% @ 30 Microns (SAE J1858) |
| Rated Flow | 17.17 gpm (65.00 L/min) |
| Notes | Standard cellulose spin-on. For premium synthetic upgrade, use LF3379 or LF9667. |
Cross References
| Brand | Part Number |
|---|---|
| Mack | 5839LF9667, 5839LF3973, 485GB3236, 21939324, 21707136, 20539275 |
| Caterpillar | 1R1807, IR1807, 3I0730, 5P1119 |
| Volvo | VOE21707133, 6884417, 466634 |
| Cummins / Case IH | 3937743 / J937743 |
| Donaldson / Baldwin | P550463 / BT8309-MPG |
| Luber-finer / Fram | LFP3973 / PH8690 |
Top Maintenance Kits
| Kit Number | Contents Included |
|---|---|
| MK13921 | FF5507, FS19966, LF3654, LF3973 |
| MK14379 | FF5507, LF3654, FS19966, LF3973 |
| MK14776 | FF42128NN, FS19765, LF17502, LF3973 |
Applications / Vehicle Fitment
| Make | Models | Engine Specs | Model Years |
|---|---|---|---|
| MACK | Anthem, Granite (GU7, GU8, CTP), Pinnacle (CHU, CXU, CXN, CHN), TerraPro (MRU, LEU), Titan (TD), LR Series, RD, DM, MR, RW, RB, CL | MP7, MP8, MP10, E7, EM7, E6, E9, ASET Series | 1964, 1981, 1982, 1984, 1985, 1988, 1991, 1996, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 |
| VOLVO | VNL Series (300, 400, 740, 760, 860), VNR Series (300, 640), VHD, VNM, VNX, VT Series, FS7, FL7, FL6, B10M, B9M, B10R | D11, D13, D16, VE-D12, TD71, TD72, TD73, TD61, THD100-104 | 1978, 1979, 1985, 1991, 1992, 1994, 1999, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| CATERPILLAR | Excavators (320, 322, 323, 324, 325, 328, 329, 330, 336), Dozers (D3, D4, D5, D6, D7), Loaders (924, 928, 930, 938, 950, 953, 962, 963, 966, 972, 973), Motor Graders (12, 120, 135, 140, 143, 160, 163), Articulated Trucks (D250, D300, D350) | C7, C9, C4.2, C4.4, C6.4, C7.1, 3116, 3126, 3054, 3056, 3064, 3066, 3304, 3306 | 1975, 1976, 1984, 1985, 1987, 1988, 1989, 1990, 1991, 1993, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019, 2020, 2023 |
| FREIGHTLINER / FORD |
FL: M2 106, 108SD, C2 Chassis, B2, Condor, FS65, XC/XB Series, FL60-FL112 Ford: F-650, F-750 Super Duty, L8501, CLT9000 |
Cat C7, 3126, 3116, 3304, 3306, Cummins ISB 6.7, ISC 8.3 | 1998, 2000, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2014, 2015, 2016, 2017 |
| OFF-HIGHWAY / AG |
Ag: Claas Lexion/Jaguar, Challenger Rogator (994, 1194), Case IH, New Holland, Massey Ferguson Const: Komatsu (D61, D65, PC12-PC350), JCB Fastrac, Doosan (DX300, DX340), Atlas Copco, Sennebogen, Terex, Vogele |
Cat C7, 3126, 3116, Cummins QSB 4.5, QSB 6.7, Komatsu SAA6D114, SAA6D107 | 1994, 1996, 1998, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Good quality, smooth feel
I got these briefs so recently that have washed just one pair so far. First off, these are very comfortable, the material is soft & bordering silky, good quality sewing. Wash well and minimal if any shrinkage. They do come a bit wrinkled from the dryer but hey, these are underwear and will go on smoothly. If it were a t-shirt, I would look sloppy. I feel the sizing is accurate. No rolling and these don't announce themselves under clothing. Planning on getting more of these boxers and replacing my old panties.
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Reviewed in the United States on January 31, 2026
★★★★★ 4
A little snug on the thighs
Size: Medium, Color: Multicoloured G (5-pack)
Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
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Reviewed in the United States on August 29, 2025
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
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Reviewed in the United States on April 13, 2026
★★★★★ 5
Finally!
Size: X-Large, Color: All Black D (5-pack)
Finally, comfortable underwear that don’t end up giving me a wedgie. I have a round booty and most cuts of underwear end up shifting as I walk and sit. The hem of the underwear comes right under my cheeks and the lightweight material ensures there’s no panty line and no shifting to where I don’t want them! I’m definitely purchasing more.
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Reviewed in the United States on May 17, 2026
★★★★★ 3
Ehh
Size: Medium, Color: Multicoloured E-(5-pack)
Very thin, still comfy but very thin material. Super soft though. I've worn and washed and they have held up but I won't be repurchasing bc these are so thin
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Reviewed in the United States on April 14, 2026