The preferred technology for many late-model vehicle engines is multi-layer steel (MLS). Recognizing that replacement applications typically offer less-than-ideal sealing conditions, Federal-Mogul engineers created an MLS technology that addresses the true aftermarket repair environment. The result is the Fel-Pro® line of PermaTorqueMLS products.

PermaTorqueMLS head gaskets offer a wide range of benefits, including: 

• Strategically placed sealing beads that help eliminate leak paths
• Extra-strong stopper layers that provide superior primary combustion sealing (where applicable)
• Full-hard stainless steel material that maintains its shape despite thermal expansion and scrubbing between the block and head
• A unique, application-specific coating that enhances sealability

What’s more, Fel-Pro PermaTorqueMLS head gaskets provide the torque retention required to maintain positive contact pressure between head and block over the life of the repair.