Pirelli & C. Ambiente and Clean Diesel Technologies, Inc. Form JV to Market and Sell Emission Control Products in Europe and the

Pirelli & C. Ambiente and Clean Diesel Technologies, Inc. Form JV to Market
and Sell Emission Control Products in Europe and the CIS Countries

VENTURA, Calif. and MILAN, Italy, Feb. 20, 2013 (GLOBE NEWSWIRE) -- Pirelli &
C. Ambiente SpA and Clean Diesel Technologies, Inc. (Nasdaq:CDTI) (CDTi) today
announced the signing of an agreement to form a joint venture company to
market and sell emissions control products for both gasoline and diesel
applications in Europe and the CIS countries. The new joint venture company,
Eco Emission Enterprise Srl, will be located in Milan, Italy, and is expected
to begin operations in March 2013.

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Pirelli logo

Through the joint venture, CDTi and Pirelli aim to consolidate their
leadership in supplying solutions to control polluting emissions for the
on-road and off-road heavy and light duty markets, both in the Original
Equipment and After Market segments. In addition, the two companies intend to
enhance the synergies deriving from the joint venture through eventual joint
initiatives. The agreement entails the supply to the joint venture of silicon
carbide substrates by Pirelli & C. Eco Technology RO (Romania) and emission
control solutions by CDTi. Eco Emission Enterprise Srl, which will have an
international management team, will operate as the commercial arm for both
partners on the European market.

"We take great pride in forming a strategic joint venture with Pirelli, a
globally-renowned multinational company with leading technologies and
products," said Craig Breese, Chief Executive Officer of CDTi."The formation
of the joint venture enhances our combined product portfolios and capabilities
and aligns well with both companies' business development strategy. This
agreement expands and enhances CDTi's presence in Europe and leverages
Pirelli's longstanding OEM relationships and rich history as a global leader
in the European market, making them the perfect partner for CDTi."

"With their high level of technological expertise and long experience in
emissions' control systems, CDTi is an ideal partner with whom to develop
commercial initiatives for the distribution of our products. The joint venture
is a first step and will allow us to develop important synergies and expand
our markets of reference, as well offering our clients an ever more complete
range of products with high level technological components," said Giorgio
Bruno, Chief Executive Officer of Pirelli & C. Ambiente.

CDTi is a vertically integrated global manufacturer and distributor of
emissions control systems and products, focused on the heavy duty diesel and
light duty vehicle markets. CDTi utilizes its proprietary patented Mixed Phase
Catalyst (MPC®) technology, as well as its ARIS® selective catalytic
reduction, Platinum Plus® fuel-borne catalyst, and other technologies to
provide high-value sustainable solutions to reduce emissions, increase energy
efficiency and lower the carbon intensity of on- and off-road engine
applications. CDTi is headquartered in Ventura, California and currently has
operations in the U.S., Canada, U.K., France, Japan and Sweden.

The CDTi logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=5742

Pirelli & C. Ambiente S.p.A provides solutions for sustainable development in
relation to energy production. This includes alternative combustion fuels such
as CDR-P, a high quality combustible derived from solid urban waste, as well
as photovoltaic and wind installations through its indirect holding in
Greentech Energy Systems A/S. Pirelli & C. Eco Technology RO (Romania),
develops and produces environmental solutions principally based on silicon
carbide. Both companies are 100%-owned units of the Pirelli Group.

The Pirelli logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=17216

Forward-Looking Statements Safe Harbor. Certain statements in this news
release, such as statements regarding future collaborations or joint
initiatives, or the possibility of increased sales or market expansion,
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 CDTi's filings
with the U.S. Securities and Exchange Commission, uncertainties and other
factors that may cause the actual results, performance or achievements of CDTi
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. Neither CDTi nor Pirelli assume any
obligation to update the forward-looking information contained in this
release.

CONTACT: CDTi Investor Relations
         Tel. +1 (805) 639 9555
         ir@cdti.com
         www.cdti.com
        
         Pirelli Press Office
         Tel. +39 02 64424270
         pressoffice@pirelli.com
        
         Pirelli Investor Relations
         Tel. +39 02 64422949
         ir@pirelli.com
         www.pirelli.com

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