Terms & Conditions

Shipping & Returns

All sales are final, unless you ordered something that is out of stock before we updated our inventory. In the rare case we are out of stock, we will contact you and discuss solutions, including a full refund.

Please make sure you are ordering the correct part for your application. If you have any questions or hesitation, please email us at

Many of our tuners are VIN specific, meaning they cannot be returned for a refund. So we do not offer returns or refunds on tuners. 

We are partnered with several distribution centers, if you order multiple parts at once, chances are they will be shipped from different locations. Each part will have its own tracking number. 

We will email you a tracking number (UPS) once your order has shipped. 

Please allow 1 business day for processing your order and 4-8 business days for shipping. Express shipping is available at checkout and will take 1-3 business days. 

If we messed up and sent you the wrong part, but you ordered the correct part, we will exchange it for the correct one. We offer free shipping on all orders in the lower 48 States. You may still order to Hawaii or Alaska but an additional shipping charge will be applied to your order by one of our representatives. We will reach out to you with a quote if you have already placed your order. You can always email us first to get a shipping quote. The additional shipping charge must be paid in full before your order will be processed.

Release of Liability

Attention: The products for sale on The Diesel Dudes website are exclusively restricted to off road or race use ONLY. In addition, they are not for sale for any pollution controlled vehicle in the United States. Removal of the diesel particulate filter (DPF) and/or the exhaust gas recirculation (EGR) is against Federal regulations set forth by the Environmental Protection Agency (EPA). By purchasing or installing any of our products the customer understands its restricted use and releases The Diesel Dudes and its owners, from any/all liability. The customer understands they are fully responsible for making sure their vehicle complies with all local, state and federal emissions regulations. The customers assume all risks that result from installing any of our products, including but not limited to, loss of vehicle warranty, fines and penalties. The Diesel Dudes and its owners can in no way be held liable for indirect, incidental and/or consequential damages caused by purchase, installation, and/or use of our products.