New head gaskets solve sealing issues in 2.5-L Subaru ‘Boxer’ engines

Southfield, Mich.—Federal-Mogul has introduced two next-generation Fel-Pro PermaTorque MLS head gaskets that help eliminate sealing concerns on the full range of Subaru 2.5-L SOHC and DOHC “boxer” engines dating back to the 1996 model year. Thousands of these engines might be susceptible to sealing problems related to the use of OE-style composite or early-generation multi-layer-steel head gaskets.


The new Fel-Pro PermaTorque MLS head gaskets combine Federal-Mogul’s aftermarket-proven multi-layer-steel gasket technologies with a next-generation LaserWeld stopper layer design, developed and validated in partnership with NASCAR Sprint Cup engine builders. Each gasket also includes a proprietary coating technology that accommodates a wide range of surface finishes encountered in the aftermarket repair environment.


Many of today’s more powerful yet lighter-weight engines present difficult sealing challenges for conventional head gaskets. In particular, increased casting motion between the head and block surfaces can quickly cause scrubbing and/or crushing damage to composite-style gaskets.


“Using a replacement composite style head gasket on these engines will very likely lead to repeat sealing failure,” Fel-Pro Product Manager Jim Daigle said. “The only solution is to use a modern, high-quality MLS gasket engineered specifically for the repair environment. While the MLS gasket might cost more than a composite gasket, the overall cost will be much lower when compared to an expensive sealing failure.”


The new Fel-Pro PermaTorque MLS gaskets are available in complete head gasket sets for the following applications:


• 1999-2009 Subaru 2.5-L SOHC (EJ251, EJ252 and EJ253)

Fel-Pro head set: #HS26170PT1


• 1996-1999 Subaru 2.5-L DOHC (EJ25D)

Fel-Pro head set: #HS26167PT; HS26167PT-1; HS26167PT-2


• 2004-2009 Subaru 2.5-L DOHC Turbo (EJ25T, EJ255 and EJ257)

Fel-Pro head set: #HS26259PT; HS26259PT-1


Parts & People

Parts & People is published monthly by Automotive Counseling and Publishing Company, Inc., a Colorado corporation, P.O. Box 18731 Denver, CO 80203, 303-765-4664. President-Lance Buchner. Founded by Lance Buchner and Dave Lucia.

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