Cometic
Cometic, head & base gasket kit 4.250" MLS/RCS
Cometic, head & base gasket kit 4.250" MLS/RCS
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.030" MLS (multi Layer Steel) head & .014" RCS (Rubber Coated Steel) base gaskets. Fits both oil cooled and water cooled heads. Special design allows the gasket to fit into the cylinder bore embossement... while even keeping the oil cooling port open on oil cooled heads. With this gasket the 4.250" big bore size is a true bolt-on application for both oil & water cooled M8 models. Kit to service one engine.
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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.