Protecting your engine from contaminants is essential. More precise engineering leaves less room between machine components than before, so choosing the correct filter is more important than ever. Cat Advanced High-Efficiency Engine Oil Filters have increased contamination control without giving up capacity. They meet stricter emission requirements and are available as an upgrade for some Standard Efficiency Filters when better filtration is favorable. The Cat 1R-1808 filter contains an improved, higher efficiency filter media. This media is designed to increase contaminant capturing efficiency while maintaining excellent dirt holding capacity characteristics. FEATURES: Spiral roving and beading for pleat stability to better hold particles Properly cured filter media for longer performance One-piece aluminum base plate Strong nylon center tubes to prevent metal contamination A heavy-gauge canister for better structural strength One-piece molded urethane end caps to help to eliminate leaks Caterpillar manufactures over 80 percent of its liquid filter volume on an automated assembly line. This strict quality control eliminates variation from part to part. The CAT 1R-1808 filter offers better filtration efficiency than standard oil filters, improved engine cleanliness, and longer component life. CROSS-REFERENCE: Agco 504594D1 Baldwin B7299 Caterpillar 1R1808, 2752604, 275-2604 Claas 7983030 Donaldson P551808 Luberfiner LFP4005RN Napa 7792 Nelson Winslow 3933642ZF Wix 57792 Fleet Guard LF691A, LF3566, LF9691A SPECIFICATIONS: Efficiency Rating: Advanced Efficiency Installation Type: Spin-on Diameter Length (MM): 135.8 FREQUENTLY ASKED QUESTIONS:   1. Does this filter has a similar thread but too wide for Powerstroke without pan modification? Correct. This filter is not meant for a Powerstroke. 2. Does it fit well in 99-03 7.3? No, it will not fit a 7.3 3. What is the micron rating? It depends on efficiency. it's about 4 microns at 20% efficiency, 9 microns at 50%, 24 at 100%, etc. 4. What are the overall diameter and the diameter of the rubber gasket? 5 3/8" and 4 3/8" respectively. 5. What is the capacity of this filter in quarts? Under 4 quarts APPLICATIONS: AC-DELCO PF2101, PF2101F, PF2101L. PF879, PF981 ALLIANCE ABP/N10G-LF691, ABP/N10G-LF691A, ABP/N10G-LF9691A, ABP/N10G-LK54CA, ABP/N10G-LK56CA, ABP/N10G-LK96CA AMSOIL SDF73 AQUA POWER 6027 BALDWIN B49, B7245, B7249-MPG, B7272, B7299, B7402, B97, B99, B99-B, B99-MPG, B99-SS, BK6184, BK6217, BK6221, BK6226, BK6227, BK6229, BK6231, BK6233, BK6236, BK6237, BK6238, BK6239, BK6247, BK6254, BK6259, BK6266, BK6269, BK6271 BERING 26300-63000 BIG A 92722, 97292, 92801, 92848 CARQUEST 85722, 85792, 85792XD, 85792XE, 85801, 85848 CASE 012335, 684206-C1 CATERPILLAR 1R-0716, 1W-2660, 249-2347, 2P-4005, 3I-1284, 3I-1293 CHAMPION HO508 CHICAGO PNEUMATIC 3PS-5189 COACH GUARD T08-1075 CROSLAND 9334 DELUXE WD-434, WD-617 DONALDSON ELF7405, LFP554005, LFP554206, P166175, P167405, P550788, P551808, P554005, P554105, P554206, P559019, P559027, P559039, P559063, P559082, P559085, P559088, P559093, P559097, P559210, P559214, P559260, P559261, P559264, P559281, P559288, P559295, P559302, P559308, P559578, P559579, P559582, P559606, P559619, P559629 FIAAM FT4940 FLEETGUARD HF35076, LF3374, LF3472, LF3566, LF691, LF691A, LF703, LF9691, LF9691A FLEETRITE LFR-8691, LFR-8703, MKR811060, MKR811266, MKR88 FRAM HPH3335, HPH3335FP, PH3335, PH3426 GENERAL MOTORS GM 25011401, GM 6439658 GONHER GP52, GP52M HASTINGS B7402, FP359, FP360, LF282, LF282XS, LF359, LF360, LF567 IHC-NAVISTAR 1663805C1, 3014491C91, 684206-C1, 684206C2 KRALINATOR L190, L206 LUBER-FINER LFP4005, LFP4005HE, LFP4005RN, LFP4005SC, LFP4005TRT, LFP4005XL, LFP8469, LK103CA, LK142CA, LK175CA, LK203CA, LK213CA, LK54CA, LK56CA, LK83CA, LK87D, LK90CA, LK93CA, LK96CA, LK97D MACK 485GB4355 MANN FILTER W12104, WD13145, WD13145/1 MOTORCRAFT FL 326, FL328 NAPA 1722, 1792, 1801, 1848 NELSON 85402A PALL PMX4005-10 PURE FLOW INC. PLF-4005 PUROLATOR K50010, L45923, L50095, L60069, L65236, L65969 VOLVO 17201-5003, 3430937, 3945425 WAUKESHA 199395 WIX 51722, 51792, 51792EC, 51792MP, 51792XD, 51792XE, 51801, 51848, 57604