Premium Dual Systems Features 409-Grade Stainless Steel Construction, Pair of Ultra Flo™ Welded Mufflers & Brand's Exciting New Tips

MONROE, Mi., July 23, 2010 – DynoMax® Performance Exhaust, a leading supplier of dyno-proven exhaust technologies for muscle cars, diesel and gas trucks, sport utility vehicles and sport compact/European cars, has announced the release of two systems for 2008-09 Dodge Challenger SRT-8 and RT Hemi models, delivering performance, sound and style to the powerful platform.

DynoMax Performance Exhaust products are manufactured and marketed by Tenneco Inc. (NYSE: TEN). Available wherever performance exhaust products are sold, the DynoMax cat-back system posts an increase of 24 horsepower and 24-ft. lbs. of torque out of the Hemi Challenger SRT-8 model and 11 horsepower and 24-ft. lbs. of torque out of the Hemi Challenger RT model.

Both new Challenger systems feature high-quality, 409-grade stainless steel 3-in. intermediate pipes and tailpipes, providing protection against corrosion.

The new SRT-8 (p/n 39484) and RT (p/n 39490) systems feature the brand’s popular DynoMax Ultra Flo™ Welded muffler – a 100-percent welded construction for improved durability and extended lifetime – that supports flow up to 2,000 SCFM and 2,000 horsepower. The straight-through unrestricted design features exclusive Continuous Roving Fiberglass (CRF) technology that absorbs unwanted interior resonance.

The Dodge Challenger SRT-8 and RT systems include a pair of 3-3/4-in. by 7-in. square tips that conform to the bumper valance.

Built for “Pure Unadulterated POWER,” the new systems were application engineered to provide maximum performance and highly specific acoustical characteristics. The systems are manufactured entirely in the United States.

The new stainless system is covered by a limited lifetime warranty and exclusive 90-day Performance and Sound Guarantee, an offer that lets enthusiasts try the muffler for 90 days. Consumers can return the product within 90 days for a full refund of its purchase price. Additional restrictions apply and can be found at www.DynoMax.com.

To find out more information about the 2008-09 Dodge Challenger Hemi applications and other popular vehicles, please visit 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 $4.6 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.