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Clean Diesel Technologies Announces a New Non-Executive Director to the Board

STAMFORD, CT (09 June 2005) … Clean Diesel Technologies, Inc. (CDT) (EBB:CDTI & AIM:CDT/CDTS), a developer of chemical and technological solutions to reduce harmful engine emissions, today announces the appointment of John Jay McCloy II to the Board with immediate effect.

Mr. McCloy, aged 67, brings 40 years' experience in the corporate management, international finance and private equity / venture capital industries. Mr. McCloy is currently the Chairman of Gravitas Technology Inc., an information technology firm focused on the financial sector and was previously CEO of NCT Group, Inc. on whose board he still sits.

Alongside his extensive business experience, John has strong transatlantic links and vital connections with Asia and Europe. McCloy is currently a member of the US Council on Foreign Relations and is also a member of the Advisory Board of Princeton University (his alma mater). He is a Director of Ashland Management, Inc., Sound Shore Mutual Fund, Inc., Patriot Oil (UK) Limited and the American Council on Germany. In addition, McCloy advises a range of global organizations on policy matters. John was formerly a Director of Business Development for Nicholson International and Chairman of Mondial Limited.

Commenting on his appointment he says: "I have found a natural fit in Clean Diesel and see substantial growth prospects as the Company adds marketing breadth to its existing technological depth. Clean Diesel is leading the way in helping market pioneers adopt environmentally sound engine technologies that comply with the latest anti-pollution regulations. I look forward to helping an environmentally friendly company expand and prosper."

Dr. Bernhard Steiner, CEO of Clean Diesel, said: "John brings a wealth of business experience and a truly global network of contacts to Clean Diesel. The combination of industry, financial and cultural expertise will assist us with our growth plans going forward. We are delighted to welcome John to the Board."

There are no further disclosures to be made regarding this appointment under Schedule 2 paragraph (g) of the AIM rules.

About Clean Diesel Technologies, Inc.

Clean Diesel Technologies, Inc. is a specialty chemical company with patented products that reduce emissions from diesel engines while simultaneously improving fuel economy and power. Products include Platinum Plus® fuel catalysts, the Platinum Plus Purifier System, and the ARIS® 2000 urea injection systems for selective catalytic reduction of NOx. Platinum Plus and ARIS are registered trademarks of Clean Diesel Technologies, Inc. For more information, visit CDT at www.cdti.com or contact the Company directly.

Certain statements in this news release constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements involve known or unknown risks, including those detailed in the Company’s filings with the Securities and Exchange Commission, uncertainties and other factors which may cause the actual results, performance or achievements of the Company, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof.