Features Premium 409-Grade Stainless Steel Construction, Includes Ultra Flo™ SS Mufflers

MONROE, MI., Sept. 30, 2009 – 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 released several premium stainless steel exhaust systems for 2007-09 Jeep Wrangler JK and JK Unlimited models. The new systems – dyno-proven improvement of up to a seven horsepower and 8-ft. lbs. of torque – are available now at performance retailers nationwide.

DynoMax is manufactured and marketed by Tenneco Inc. (NYSE: TEN).

All of the new cat-back systems feature high-quality, 409-grade stainless steel 2.5-in. intermediate and tail pipes, providing protection against corrosion and permanent discoloration; all necessary OE-grade stainless steel clamps and hardware; detailed installation instructions; and 3-in. polished, stainless steel tips.

Built for “Pure Unadulterated POWER,” the new system was application engineered to provide maximum performance and highly specific acoustical characteristics. The system, built entirely in the United States, is backed by a limited lifetime warranty.

Each new system includes the DynoMax Ultra Flo™ SS muffler, a dyno-proven muffler design that flows up to 2,000 SCFM and supports up to 1,900 horsepower. The Ultra Flo SS muffler utilizes exclusive Continuous Roving Fiberglass (CRF) technology to absorb unwanted interior resonance.

The systems include:

• 2007-09 Jeep Wrangler JK Unlimited 3.8L (p/n 39457) – dual system dyno-proven horsepower increase of 7 horsepower and 8-ft. lbs. of torque.
• 2007-09 Jeep Wrangler JK Unlimited 3.8L with high-clearance, offroad rockcrawler design (p/n 39458) – single system.
• 2007-09 Jeep Wrangler JK 3.8L with high-clearance, off-road rockcrawler design (p/n 39464) – single system.
• 2007-09 Jeep Wrangler 3.7L (p/n 39445) – single system.

For more information about the new stainless steel 2007-09 Jeep Wrangler systems from DynoMax or any other DynoMax products, 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 $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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