Cometic Chrysler 6.2L Hellcat 4.150in Bore .040 MLX Head Gasket - RightCOMETIC MLX (Multi Layer Stopper) gaskets utilize an integrated stopper layer for combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion. MLX technology can be found in some head gaskets and are made from the same materials as our MLS Head Gaskets. No sealants or re torque required. This Part Fits: Year Make Model Submodel 2018 Dodge Challenger SRT Demon 2015 2019 Dodge Challenger SRT Hellcat 2019