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Cometic Twin Cam head and base kit for 3.938‑inch bore includes .027‑inch MLS gaskets designed for air‑cooled Twin Cam service. The MLS construction combines embossed AMP-coated outer layers with an adjustable stainless steel shim center to conform load distribution, lower clamp load and reduce bore distortion, offering consistent head sealing under demanding conditions.
Cometic Twin Cam 3.938in Head & Base Kit .027inMls Air Cooled
