EXHIBIT 16.1




December 4, 2003



Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

Gentlemen:

We  have  read  Item  4  of  Form  8-K  dated  December  2, 2003 of Clean Diesel
Technologies,  Inc.  and  are  in  agreement  with  the  statements contained in
paragraphs  two  and  three  on pages 1 and 2 therein.  We are also in agreement
with  the  information in paragraph one of Item 4 relating to the effective date
of  the  Registrant's dismissal of Ernst & Young LLP, as noted in correspondence
received  from  the Registrant's CFO, dated November 26, 2003.  We have no basis
to  agree  or  disagree  with  other  statements, including other information in
paragraph one not addressed above, of the registrant contained therein.



                                                /s/ Ernst & Young LLP


Stamford, Connecticut