MLX (Multi-Layer Stopper) Head Gaskets are the MLS style gasket with an integrated “stopper” layer embossed into the layers of stainless steel covered with an outer layer of viton rubber coating. This “stopper” optimizes combustion chamber sealing and “improves clamp load around the cylinder without increasing bore distortion”.
“With the Stopper gasket, the center layer is folded over back onto itself — this creates an additional stack-up right at the bore, and once you tighten everything down, it focuses more clamp-load from the bolts to the bore.” – Kevyn Kistner, Cometic
Perfect for high compression, boosted or NOS engines that create big horsepower and as a result high cylinder pressures. No sealant or retorquing required. Compressed operating thickness 0 .040”. 18 Bolt Heads.