Cometic 2014+ Harley-Davidson Twin Cooled 3.937 .040 MLS Head Gasket w/ Base O-Ring

This Cometic Multi-Layer Steel (MLS) head gasket set includes the gasket itself and a base O-ring, specifically made for 2014 and newer Harley-Davidson Twin Cooled engines. It's built to a 3.937 inch bore size and is .040 inch undersize, which is important for engine builders looking for precise tolerances during a rebuild or top-end work.

MLS head gaskets are known for their durability and ability to handle high compression and temperature changes common in performance V-twin engines. The multi-layer design offers a strong seal, and the included base O-ring helps ensure a leak-free fit against the cylinder block. Using an undersize gasket like this one can be crucial when machining the cylinders or heads, allowing you to achieve the desired compression ratio and deck height.