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Thoroughbred Diesel Company Policies
* Certain manufacturers are excluded from any promo codes you may try to use online. Orders can only use 1 promo code per order. Excluded manufactures include AFE, Airdog, Applied, ARP, ATS Transmissions, Autometer, BD Diesel, BMF Wheels, Bullydog, Bushwacker, Combo Packages, Core Charges, Diablosport, Diamond Eye, Diesel Site, Edge Products, FASS, Firestone, Fuel Wheels, Hypertech, Mag-Hytec, Magnaflow, MBRP, Rigid Industries, S&B, SCT, Sinister, Smarty, South Bend Clutch, Stanadyne, Suncoast, Superchips, Thoroughbred Gift Cards, VP44

*All promo codes exclude from the following manufacturers: Edge, Superchips, Smarty, FASS and S&B. Also orders must be over $100.
Return policy
  Satisfaction Guarantee
Thoroughbred Diesel would like for you to shop with confidence. Customer satisfaction is our number one goal. If you are not satisfied with your purchase for any reason, return the item within 30 days from the date received for an exchange, store credit, or credit depending on the products condition. Shipping is not refundable. RMA #'s are only valid for 14 days. After 14 days customers have to request and have a new RMA # approved.

Defective Items

In the event an item arrives in an unacceptable condition as a result of a manufacturer defect, Thoroughbred Diesel will go above and beyond to resolve the issue. Follow our Return Procedure to easily handle any returns.

Damaged Items

Thoroughbred Diesel thinks UPS/Fed Ex is great! However, in the event a package appears damaged during shipping, please refuse shipment of the item and follow our Return Procedure.


Items in new condition (including original packaging, paperwork, hardware and instructions) may be returned for exchange. No restocking fee will be charged on exchanges.


Thoroughbred Diesel does not manufacturer any of the products they carry and therefore do not imply nor offer any warranty on them. All product warranties if any, implied have been done so at the discretion of the manufacturer. If you need warranty assistance on any product you’ve purchased, please contact the manufacturer directly.
Return Procedure
  1. Complete the Easy Returns form.
  2. Within 24-48 hours our returns department will contact you either via e-mail or phone call.
  3. Our returns department will issue a RMA# and provide further instructions to complete the return. RMA #'s are only valid for 14 days. After 14 days customers have to request and have a new RMA # approved.
  4. Preparing your item for shipment:
    a. Returns must be packaged securely in an outer carton.
    b. Do not write on the original product packaging itself. Only on the outside shipping carton.
    c. Returned product must be in new, re-saleable condition, with all original boxes, packaging, parts, cables, manuals, etc.
    d. Keep your tracking number until the return process is finalized.
  5. Upon receipt, all returns will be inspected, and, at our discretion, credit may be refused or a restocking fee up to 15% may be assessed.
  6. Customer is responsible for shipping cost incurred on returned products. Original shipping charges will not be refunded. If an item is deemed defective upon receipt, Thoroughbred Diesel will provide a pre-paid return shipping label. Once we have confirmed the package is in transit, we will ship you a replacement.
* Reasons/Circumstances a credit will not be issued:
  • Product has been installed
  • Product is damaged from installation
  • Missing parts, manuals, or original packaging
  • Seal on electrical part is broken
  • Product serial number does not match the original serial number shipped to the buyer
  • Product is deemed not re-saleable due to customers actions
  • Special Orders are not returnable or refundable.
  • Thoroughbred Diesel will not reimburse labor charges or installation fees under any circumstance.
* Special restrictions apply to some of our manufacturers.
  • PPE – Only returnable if unopened. If an item is opened, used or defective, a RMA number must be obtained from PPE. Once the RMA number is received, please follow our Return Procedure to complete the return.
  • S&B – S&B requires a 15% restocking fee on any returned item. This is S&B’s policy and out of Thoroughbred Diesel’s control.
Shipping Policy
  * Thoroughbred Diesel exclusively ships via UPS/Fed Ex on all orders considered non truck freight. We only ship to the fifty U.S states and Canada which excludes all other international destinations. In the event that you, the customer, places an order to an International address not listed above, Thoroughbred Diesel reserves the right to cancel your order and issue a full refund.

* In most cases Thoroughbred Diesel only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud your billing information must match the credit card you provide. If you want to ship to an address different from your billing address, we require a copy of your driver’s license faxed (859-737-1865) or emailed to sales@thoroughbreddiesel.com.

* Shipping Times
  • Most products ordered will ship within 1-2 business days. Some exceptions may include back ordered and/or direct ship items. Thoroughbred Diesel has numerous warehouses across the country allowing us to reach 90% of the U.S. within 2 days.
  • Non-stock, special order and out of stock items may take 1-2 weeks to be received. If you would like to check inventory or estimated ship date please contact us toll-free at 866-737-4966.
  • Although we take great pride in delivering products quickly, we only guarantee product arrivals on expedited shipping for products that are in stock.
  • Thoroughbred Diesel is not responsible for shipping delays due to weather or unforeseen incidents.
  * Free Ground or Next Day Air Shipping
  • Free Ground or Next Day Air Shipping is available on specially marked products on Thoroughbreddiesel.com. This free shipping offer is good only to US addresses in the 48 contiguous states, which excludes Hawaii, Alaska, Puerto Rico and the U.S. Virgin Islands. This offer does not apply to truck freight items.
  • Specially marked items with Free Next Day Air shipping is not available to Canadian customers. Thoroughbred Diesel will ship any product listed with Free Next Day Air shipping UPS/Fed Ex Standard Ground free of charge.
* Canadian customers are responsible for all duties and taxes incurred.

* APO/FPO Shipping (Military Address) – Thoroughbred Diesel cannot ship product directly to APO or FPO addresses because we exclusively use UPS/Fed Ex for shipments and they do not allow shipments to these addresses. As an option, you may want to consider shipping to a stateside street address and then sending the package to the APO/FPO address overseas via the US Postal Service.
Core Policy
  * Definition of Core: The core is the old unit which is being replaced by a new or rebuilt item.
* Many stock replacement parts such as turbos, injectors, injection pumps, and high pressure oil pumps have a core charge that is associated with the new replacement part. You must return the old core to receive a refund on the core charge. All cores must be like for like and include all parts and pieces that were received on your new replacement product.
* All cores must be in rebuildable condition to receive a refund of the core charge (Burnt, water damaged, or broken cores will be rejected).

Core Return Label
The core return label is a new option offered by Thoroughbred Diesel to customers that buy products that have a core charge. For a small fee Thoroughbred Diesel will send you a core return tag either to your email or right to your mail box. This will save you money on the return shipping and will make sure your cores get returned correctly. The label will be insured to protect your core. Which will make it a complete hassle free process. Only available for the 48 contiguous states. If you have any questions on it contact cores@thoroughbreddiesel.com.


No upfront Core Charge
Thoroughbred Diesel has implemented a policy on many products that eliminates the upfront core charge at time of purchase reducing out of pocket expense to the consumer on some products. On parts that are not charged core you will have 14 business days from the time of receipt of the shipping label to get the core back to Thoroughbred. You will be sent a pre-paid shipping label separate through the USPS Mail. If you have any problems contact cores@thoroughbreddiesel.com.

* PayPal & All Other Non Credit Card Orders:
All non credit card orders, such as PayPal, and eBay will require that we have a credit card on file on orders with a core value. The on file credit card will not be charged unless the core is not returned in the specified time frame. We can also arrange a refundable core charge as well. If you choose to pay via one of these methods a Thoroughbred Diesel sales agent will contact you to obtain a credit card for our files. For any questions, please contact us toll-free at 866-737-4966.

* Core Physical Condition:
There are some reasons you would not receive payment on your core or you would receive a partial refund on your core.
  • Burnt
  • Water Damage
  • Broken
  • Disassembled
  • Missing parts and/or pieces
The refund amount is not determined by Thoroughbred Diesel, but by the manufacturer receiving the core. In the event you will not receive a full refund, you will be contacted by the Thoroughbred Diesel core department.

* Core Charge Timeline:
  • The credit card that we have on file will be charged for the amount of the core (amount will vary depending on the part, and will appear on the invoice).
  • If the core is returned after 30 days, a refund of the core charge minus 15% will be issued to the customer.
  • If the core is returned after 60 days, a refund of the core charge minus 30% will be issued to the customer.
  • If the core is returned after 90 days, a refund of the core charge minus 50% will be issued to the customer.
Core Return Procedure
  1. Please retain all packaging of your new item to be used for the core return.
  2. Drain all fluids: oil, fuel, etc. out of the core before it is returned.
  3. Place any plastic plugs or caps received on the new item back onto the core.
  4. To insure UPS/Fed Ex will not reject the package due to fuel or oil leakage, please put inside and wrap in plastic garbage bag.
  5. Place core inside the box.
  6. If there was core return paperwork inside the box, please complete the form and send back with the core.
  7. Thoroughbred Diesel provides a pre-paid shipping label for any product that does not require an upfront core charge. This is usually sent to the billing address provided within 2-4 business days via US Postal Service.
  8. If for any reason, you decide to return the new pump, DO NOT use the return label provided because it will be processed as a core. Please reference the Return Procedure or contact the Thoroughbred Diesel Returns department at 866-737-4966.
  9. If you would like the return label sent to a different address or you no longer have your return label, please contact Thoroughbred Diesel’s core department at 866-737-4966 or e-mail cores@thoroughbreddiesel.com.
  10. Customers outside the continental US (lower 48 states) will be responsible for shipping the core back. UPS/Fed Ex return service labels can only be sent to customers in the lower 48 US states. Please call if you have any questions.
  11. If you are responsible for shipping the core back to Thoroughbred Diesel, please provide a tracking number to cores@thoroughbreddiesel.com. Without a confirmed tracking number, we cannot guarantee your core refund.
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Thoroughbred Diesel logo glowing Thoroughbred Diesel Performance and Repair Shop
4843 Rockwell rd.
Winchester, KY 40391
Call Toll Free: 1-866-737-4966

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