Premium Stainless Steel Exhaust System Pushes Horsepower and Torque Levels to New Heights.

MONROE, MI., July 23, 2009 – DynoMax® Performance Exhaust has released a brand-new premium stainless steel cat-back system for 2005-09 Ford Mustang GT 4.6L/Shelby GT 500 5.4L/Shelby GT 4.6L (p/n 39460) muscle cars, built specifically to exceed the expectations of Ford Mustang owners. The new system delivers an increase in performance, unique sound and easy installation.

DynoMax, manufactured and marketed by Tenneco Inc. (NYSE:TEN), is one of North America’s leading suppliers of dyno-proven exhaust technologies for muscle cars, diesel and gas trucks, sport utility vehicles, and sport compact/European cars.

Every DynoMax Performance Exhaust system was application-engineered to provide maximum performance and highly engineered acoustical characteristics. The cat-back system for the late-model Mustang posts gains of 11 horsepower and 18-ft. lbs. of torque during dyno testing.

The powerful DynoMax cat-back features high-quality, 409-grade stainless steel 3-in. intermediate pipes, providing protection against corrosion and permanent discoloration. The system is manufactured entirely in the United States.

The system is built around the DynoMax® Race Bullet welded performance muffler, a straight-through, 100-percent welded design for lifelong durability. The unrestricted design features exclusive Continuous Roving Fiberglass (CRF) technology that helps provide up to 4 dbA sound reduction on most applications while maintaining a deep, aggressive race tone. The Race Bullet welded muffler epitomizes the brand’s tag line, “Pure Unadulterated POWER.”

To finish the system, DynoMax includes a 4-in., slant-cut, single-walled polished logo-embossed stainless steel tip and a 4-in. tailpipe, and top-quality, OE-grade stainless steel clamps and hardware. The exhaust system includes specific, easy-tounderstand installation instructions.

For more information on the new stainless steel cat-back systems for the 2005- 09 Ford Mustang GT and other models, go to www.dynomax.com, contact your nearest DynoMax supplier or call 1-734-384-7806. For the name and location of your nearest DynoMax performance exhaust retailer, check out the dealer locator at www.dynomax.com.

Tenneco is a $5.9 billion manufacturing company with headquarters in Lake Forest, Illinois and approximately 21,000 employees worldwide. Tenneco is one of the world’s largest designers, manufacturers and marketers of emission control and ride control products and systems for the automotive original equipment market and the aftermarket. Tenneco markets its products principally under the Monroe®, Walker®, Gillet™ and Clevite® Elastomer brand names.

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