February 2, 2005 - Tenneco Automotive (NYSE: TEN) has acquired substantially all the assets of Gabilan Manufacturing, Inc., a privately held company that has developed and manufactured motorcycle exhaust systems exclusively for Harley-Davidson motorcycles since 1978.

Gabilan, which generated $38 million in revenues in 2004, is the exclusive muffler manufacturer for all of Harley-Davidson's motorcycle families. Based in Salinas, CA, the company also produces aftermarket muffler kits solely for Harley-Davidson. The reputation of Gabilan's motorcycle exhaust business has been built on quality and customer service. The business has about 240 employees, the majority of which are located at Gabilan's headquarters and main manufacturing facility in Salinas. The company also operates three other facilities in Lincoln, NE, Milwaukee, WI and Emigsville, PA.

Tenneco Automotive is a $4.2 billion manufacturing company with headquarters in Lake Forest, Illinois and approximately 18,800 employees worldwide. Tenneco Automotive is one of the world's largest producers and marketers of ride control and exhaust systems and products, which are sold under the Monroe® and Walker® global brand names. Among its products are Sensa-Trac® and Monroe Reflex® shocks and struts, Rancho® shock absorbers, Gillet™, Walker®, Quiet-Flow® mufflers and Dynomax® performance exhaust products, and Monroe® Clevite™ vibration control components.

Duff & Phelps, LLC initiated the transaction, assisted in negotiations, and served as the exclusive financial advisor to Gabilan. Duff & Phelps is a national investment banking and financial advisory firm focused on providing merger and acquisition, private placement, valuation, financial opinion and restructuring services. Since 1932, Duff & Phelps has been committed to delivering independent advice and service of exceptional quality to a broad range of public and private companies.