Technology Enhances Sealing of Multi-Layer Steel Gasket

Federal-Mogul has introduced Fel-Pro PermaTorqueMLS performance head gaskets featuring patented Flexstop technology

Engineers at Federal-Mogul Corporation have developed the innovative, high-strength dynamic embossment technology that dramatically increases the combustion sealing capabilities of Fel-Pro PermaTorqueMLS multi-layer-steel performance head gaskets.

The company’s new Flexstop embossment design enables PermaTorqueMLS performance head gaskets to maintain a robust seal even in cases of extreme cylinder head lift and other challenging engine dynamics.

The company’s product team demonstrated the value of this technology in a pilot program with NASCAR Sprint Cup teams running the new Dodge R6 engine. The Flexstop-equipped PermaTorqueMLS performance gaskets (Fel-Pro p/n’s 26480 L and R) delivered flawless sealing performance during dyno testing and throughout the 2009 Sprint Cup season.

The Flexstop technology adds a high-strength emboss feature that works in conjunction with the head gasket’s “stopper” layer to ensure robust sealing contact pressure in spite of extreme head lift caused by peak combustion pressures.

“By incorporating the Flexstop system into PermaTorqueMLS performance gaskets, we have dramatically expanded the capabilities of what already is the predominant head sealing solution in the racing category,” said Ron Rotunno, performance product manager, Fel-Pro Gaskets.

The Flexstop design originated within the Cylinder Head Gasket Engineering team at Federal-Mogul’s Burscheid, Germany, technical center.

Fel-Pro PermaTorqueMLS performance head gaskets provide the robust seal needed to contain extreme combustion pressures and temperatures common to naturally aspirated, turbo/supercharged and nitrous-equipped performance engines. Each gasket is composed of multiple layers of full-hard stainless steel, precisely engineered sealing beads and advanced polymer coatings to maintain contact pressure between the cylinder head and block.

For more information regarding Fel-Pro PermaTorqueMLS performance head gaskets and other sealing solutions, visit www.felpro-only.com. Complete application listings for Fel-Pro gaskets and other Federal-Mogul products are available through the company’s free online www.FMe-cat.com electronic catalogue.