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Contact Us - NDZ Fill out the form below to send a message directly to our Customer Service Department. We are here to help resolve any issues, concerns or questions you have but we also like to hear if you are having a great experience as well! Thank you. Hours - Monday to Friday 8am - 4pm EST | Email - sales@ndzperformance.com Phone - 203-439-7784 | 30 Diana Court, Cheshire CT 06410.