Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same new condition that you received it. It must also be in the original packaging.

Several types of products/services are exempt from being refunded.

Non-refundable products/services:

  • Custom or one-off products
  • Services such as injector/pump testing and modification of customer supplied parts
  • Downloadable software products

Note that this is not an exhaustive list and that all refunds are issued at our discretion.

To complete your return, we require a receipt or proof of purchase.

Situations where only partial refunds (if any) are granted:

  • Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
  • Any item that is returned more than 30 days after delivery


Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

Injector Core Charge Refunds

Injector core refunds will be given upon inspection of cores and at our discretion.

Late or missing refunds

If you haven’t received a refund yet, first check your bank account again.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at sales@motorsportdiesel.com.


We only replace items if they are defective or damaged (due to our error).If you need to exchange it for the same item, send us an email at sales@motorsportdiesel.com and send your item to: 324 Cedar Street, Bluff City, TN, 37618, United States.


To return your product, you should mail your product to: 324 Cedar Street, Bluff City, TN, 37618, United States.

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the original shipping cost will be deducted from your refund.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

If you are shipping an item valued over $100, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.