Cometic’s MLX (Multi‑Layer‑Xtreme) head gasket is engineered for high‑cylinder‑pressure applications where sealing integrity is non‑negotiable. Designed specifically for the Ford 4.0L OHV Cologne V6, this gasket delivers a reinforced combustion seal, superior fluid control, and long‑term durability under demanding thermal cycles.
 
MLX Construction — What Sets It Apart
The MLX series is Cometic’s most advanced multi‑layer design, built around three core technologies:
 
1. Stopper‑Layer Combustion Seal
A dedicated fold‑over “stopper” layer creates a torque‑limiting surface around the combustion chamber.
Prevents yielding of the fire ring
Maintains clamp load consistency
Ideal for boosted, high‑compression, or high‑heat builds
 
2. High‑Temperature Proprietary Coatings
Each layer is treated with Cometic’s thermal‑resistant coating system, ensuring:
Micro‑sealing against block and head surfaces
Stability under extreme temperature swings
Reduced risk of fluid seepage
 
3. Embossed Layer Geometry
Strategic embossments create localized sealing pressure where the 4.0L OHV needs it most:
Coolant passages
Oil feed returns
Timing‑side fluid circuits
 
This is especially critical on the Cologne platform, where surface finish and clamp load vary across the head.
 
Why Builders Choose Cometic MLX for the 4.0L OHV
Cometic has earned its reputation across decades of engine building, racing, and machine‑shop use, and the MLX line reflects that history. The stopper‑layer design holds combustion pressure without distortion, giving the 4.0L OHV a sealing solution that stays stable even when cylinder pressures spike. The high‑temp coatings and embossed layers create a micro‑seal that compensates for real‑world deck surfaces — the kind that aren’t always perfectly machined or uniform after years of heat cycles.
 
For refreshed or performance‑oriented OHV builds, MLX offers the long‑term durability the original composite gaskets were never designed for. No organic material to break down, no relaxation under heat, and no seepage as the miles stack up. It’s simply a modern, motorsport‑proven upgrade for a platform that benefits from every bit of sealing integrity it can get.
 
 
Sold individually (Right‑Hand Side). Left‑Hand Side available separately Here