MCS
MCS, spin-on oil filter, with top nut for
MCS, spin-on oil filter, with top nut for
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With top nut for easy removal with a hex wrench. This is an OEM style replacement for the oil filter that was updated by H-D in 2020. This filter features a longer body (early is 89mm/3.5"; new is 102mm/4") and holds 25% more filtering media surface to better support the higher oil flow in M8 engines. The 5-micron filtering media is otherwise identical to the earlier 63798-99A (chrome) and 63731-99A (black) filter it replaces. The early filter is still advised for Twin Cam models; this longer late style filter is advised for all M8 engines.
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Why buy from Forty5°
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Verified compatibility
Every part we ship is checked against your bike's platform, year, and engine. If it doesn't fit, we tell you before you check out.
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Workshop installation
Book a serviceHave us fit it. Book installation at parts intake — same-day on most jobs, master techs only.
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Founder-led aftersales
Get in touchQuestions after fitment? You'll speak to the people who installed it. We answer email and WhatsApp seven days a week.