EST top end gasket kit. M8 3.937" bore

EST (Extreme Sealing Technology). With MLS (Multi-Layer-Steel) .040" thick head gaskets. The SLS (Single-Layer-Steel) cylinder base gaskets and SLS rocker cover gaskets used in these sets are .020" thick and have .001" of high temperature Viton rubber coating on both sides. Kit comes with all gaskets, seals and o-ring for a complete top end rebuild. Fits Softail, Touring & Trike models with both oil cooled and water cooled heads. OEM replacement reference 25700729 gasket top end kit.