Fel-Pro Gaskets brand has introduced two Fel-Pro PermaTorque MLS multi-layer-steel head gaskets that address a common combustion sealing issue encountered in 6.0L diesel engines used in more than 700,000 trucks manufactured between 2003 and 2010. The patent-pending PermaTorque MLS head gaskets (No. 26374PT – 18mm dowel applications; 26375PT – 20mm dowel applications) are now available through Fel-Pro distributors. The Fel-Pro PermaTorque MLS head gaskets feature several unique design enhancements that address combustion leakage and other issues encountered in these existing engines. The gaskets include a highly advanced new embossment design that creates increased spring force – and significantly more robust sealing contact – than conventional gasket designs under extreme loads.