Moteur Cometic

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Cometic engine components bring professional motorsport sealing technology to Harley-Davidson engine builds where the head gasket is the most critical and most failure-prone sealing surface. Their Multi-Layer Steel head gaskets — precision-embossed layers of stainless steel that deform and conform under torque to create a long-lasting, pressure-tight seal — set the benchmark for performance cylinder head sealing on Evolution, Twin Cam, and Milwaukee-Eight applications. At standard compression ratios, a composite gasket seals adequately. Push the compression ratio, change the cam timing, or fit a high-flow air cleaner, and the cylinder head sees pressure events that the engineers designing those Harley-Davidson engines never calibrated for — which is precisely when Cometic MLS gaskets justify their place in a build. Complete top-end gasket kits for Sportster XL and Twin Cam platforms simplify ordering for full rebuild jobs. Cometic's armour-clad and graphite base gasket options address the range of displacement and compression scenarios that Harley-Davidson performance builds present. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, stocks Cometic engine gaskets for UK builders who won't compromise the top end. Browse the full Cometic Engine range below.