MONROE, Mi., July 21, 2010 – DynoMax® Performance Exhaust will release brand-new, cat-back performance exhaust systems for gas 2007-2010 Dodge Ram 1500 and Chevrolet/GMC truck models. DynoMax is the performance exhaust brand of Tenneco Inc. (NYSE: TEN).

Available soon at performance retailers nationwide, the new systems provide performance benefits and an aggressive sound to the new trucks. The new systems include the innovative Ultra Flo™ Welded muffler, a straight-through, unrestricted design that is dyno-proven to support up to 2,000 SCFM and 2,000 horsepower. These mufflers are 100-percent welded for exceptional life and durability, and also include exclusive Continuous Roving Fiberglass (CRF) technology to absorb unwanted interior resonance and provide a rich, deep performance tone.

The new systems include:
• 2009-10 Dodge Ram 1500 V6/V8 (p/n 39498) gas single system –
includes 3-in. piping and 4-in. tips.
• 2009-10 Chevrolet Silverado/GMC Sierra 1500 crew cab, ext cab
(p/n 39495) gas single system – includes 3-in. piping and 4-in. tip
• 2009-10 Chevrolet Silverado/GMC Sierra 1500 crew cab, ext cab
(p/n 39499) gas dual system – includes a 3-in. inlet pipe,
dual 2.5-in. tailpipes, and dual 3-in. tips
• 2007-10 Chevrolet Silverado/GMC Sierra 2500HD, 3500 (p/n 39432)
6.0L gas single system – includes 4-in. piping and 5-in. tip

The systems features mandrel-bent, 409-grade stainless steel piping that provides extended protection against corrosion. Plus, each system includes show-styled, logo-embossed stainless steel tips. Each DynoMax system includes all OE-quality hangers and accessories for a fast, easy installation.

The new stainless systems are covered by a limited lifetime warranty and exclusive 90-day Performance and Sound Guarantee, an offer that lets enthusiasts try the system 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.

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

For more information about the DynoMax Dodge Ram system or other performance exhaust components, 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 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.