U.S. Auto Parts Network, Inc. Ranked Among Internet Retailer Magazine's Top 100 Online Retailers

Company Improves Ranking to 81st in Industry Leading Top 500 List

CARSON, Calif., June 12 -- U.S. Auto Parts Network, Inc. , has been ranked 81st in Internet Retailer magazine's annual Top 500 list of the largest online retailers. This marks a significant increase from last year's list in which U.S. Auto Parts was ranked 166th. The Company also ranked fifth in the "Specialty/Non-Apparel" category, jumping from 16th last year.

The industry-leading magazine publishes the definitive ranking and analysis of America's 500 largest e-retailers based on annual 2006 Internet sales, researched by Internet Retailer and confirmed by retailers. U.S. Auto Parts is joined on the list by other industry leaders including Amazon.com, Blue Nile, VistaPrint, and QVC.

"Being ranked among the top 100 online retailers is a great accomplishment and a reflection of our positive momentum and progress," said Mehran Nia, President and Chief Executive Officer. "We are fortunate to operate in a $90 billion addressable market and anticipate significant opportunities for continued growth."

Mr. Nia continued, "We plan to build upon our position as a leading online provider of aftermarket auto parts and accessories through further technology development, website improvements and most importantly, by enhancing the customer experience. We believe our sizeable market opportunity coupled with focused execution of our strategic plan will provide the platform for market share expansion."

About Internet Retailer

Published by Chicago-based Vertical Web Media LLC, Internet Retailer is a monthly national business magazine, web site, conference and directory that serve the retailing community. The Internet Retailer family of products focuses on the Internet's vital role in a wide array of retailing activities, including web merchandising, supply chain management and multi-channel integration. Its 40,000+ subscribers are senior executives primarily from retail chains, independent stores, catalogs, virtual merchants and brand-name manufacturers. Internet Retailer's circulation represents the largest multi-channel readership base of any retailing magazine. The magazine also publishes the most widely read e-mail newsletter in retailing, IRNewsLink, which is distributed twice-weekly to 35,000 opt-in subscribers, operates the largest retailing information web site, InternetRetailer.com, sponsors the largest conference in the e-retailing industry and publishes an annual ranking of the 500 largest web sites.

About U.S. Auto Parts Network, Inc.

Established in 1995, U.S. Auto Parts is a leading online provider of aftermarket auto parts, including body parts, engine parts, performance parts and accessories. Through the Company's network of websites, U.S. Auto Parts provides individual consumers with a comprehensive selection of approximately 550,000 competitively priced products which are mapped by a proprietary product database to over 4.3 million product applications based on vehicle makes, models and years. U.S. Auto Parts' flagship websites are located at http://www.partstrain.com/ and http://www.autopartswarehouse.com/ and the Company's corporate website is located at http://www.usautoparts.net/.