Monroe, Mich., May 7, 2012– The latest in performance exhaust systems from DynoMax^® is here for owners of the Ford Mustang GT 5.0L and Shelby GT500 5.4L V8, adding horsepower, torque and drone-free performance to the popular late-model cars. DynoMax Performance Exhaust is manufactured and marketed by Tenneco Inc. (NYSE: TEN).

Posting a performance gain of 12 horsepower and 12-ft. lbs. of torque, the new axle-backDynoMax system (Part no. 38504) for the late-model 5.0L and Shelby includes a pair of drone-free DynoMax VT™ mufflers, an innovative muffler design that controls irritating drone while ensuring maximum performance.

High-flow stainless steel VT mufflers are designed around a precisely calibrated internal valve that minimizes drone; exclusive Continuous Roving Fiberglass (CRF) technology that absorbs unwanted interior resonance and helps deepen the car’s performance exhaust tone; an attractive DynoMax VT logo-embossed body with a high-impact micro-finish and slotted bushing ends. The VT mufflers are 100-percent welded.

Designed to deliver DynoMax’s “Drone-Free Performance™,” the DynoMax VT muffler is a 100-percent welded design that is dyno-proven to flow up to 2,000 SCFM and support up to 2,000 horsepower.

Providing additional protection against corrosion and enhancing the system’s finish, the stainless steel system is 2-3/4-in. in diameter and mandrel bent. The system was designed to follow OE routing and is completed with double-walled, 304-grade, 3.5-in. tips, providing a polished and integrated fit with the vehicle’s stock rear fascia.

All necessary OE-style rod hangers and other hardware are included in the kit. DynoMax systems include handy, full-color guides for fast and easy installation.

Built to the brand’s theme, “Pure Unadulterated POWER,” every DynoMax exhaust system is backed by a limited lifetime warranty and an exclusive 90-day Performance and Sound Guarantee. The DynoMax 90-day Performance and Sound Guarantee is 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 Performance Exhaust products are manufactured and marketed by Tenneco Inc. (NYSE: TEN). DynoMax is one of North America’s leading brands of dyno-proven exhaust technologies for muscle cars, diesel and gas trucks, Jeeps, sport utility vehicles and sport compact cars.

For more information about the DynoMax VT muffler, performance exhaust systems and components for Ford Mustangs or other performance 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 $7.2 billion global manufacturing company with headquarters in Lake Forest, Illinois and approximately 24,000 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 and commercial vehicle original equipment markets and the aftermarket. Tenneco markets its products principally under the Monroe^®, Walker^®, Gillet™ and Clevite^® Elastomer brand names.

###