If you've purchased your products from DieselManor and need
installation assistance or technical support please don't
hesitate to contact us. Your purchase includes free
lifetime support on any product you've purchased from us.
Please, no non-DieselManor customers. We will ask you for
your billing name and/or invoice number so we can verify your purchase.
We are the only diesel performance company that offers
after-hours technical support. During normal business hours
we can be reached at:
603-497-2281 or for our after hours Technical Support Hotline call: 603-235-2331.
That's right, we're there for you. Decided to start your
install late at night and run into an unexpected snag? Give our
Emergency Hotline a call, we'll get you through it.
Our after-hours tech support line is available during non-business hours;
Monday - Friday 5:00PM - 10:00PM (EST), Saturday & Sunday
9:00AM - 9:00PM (EST). It will not be monitored during normal
This tech line is for DieselManor customers only!
We will ask you for your invoice number. You MUST have your
current invoice number to receive support! If the product
you are seeking support for was purchased from another diesel performance supplier please
contact them directly. We do not support products purchased from
Also be sure to check out our
Installation Sheets page for installation instructions and
For returns click on our
return policy page.