Core Policy

Q: Terms & Conditions for Cores

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 part to receive a refund on the core charge.

• In some cases, the core is not reusable, such as in the event of a cracked case, at which point the core deposit would not be credited as the core component is not reusable.
• Cores that have been disassembled and/or have missing and/or damaged major components will not receive full core credit.
• Returned cores must be on a “like-for-like” basis, meaning that the returned core has the exact same fitment as the remanufactured component that was purchased. If the core is not “like-for-like,” your core may not be eligible for return/credit.
• You are responsible for core return shipping cost.

Q: Core Return Procedure

If you are unsure where to send your core, email us at sales@underdog-diesel.com with your order number.

• Please keep all original packaging of your new item to be used for the core return.
• Drain all fluids: oil, fuel, etc. out of the core before it is returned.
• Place any plastic plugs or caps received on the new item back onto the core.
• To insure UPS, Fed Ex, or USPS will not reject the package due to fuel or oil leakage, please wrap the core in a plastic garbage bag.
• Place core inside the box.
• If core return paperwork was inside the box, please complete the form and send back with the core.
• Please provide a tracking number to sales@underdog-diesel.com . Without a confirmed tracking number we cannot guarantee your core refund

Q: Core Charge Timeline

• If the core is returned after 30 days, 90% of the core will be refunded.
• If the core is returned after 60 days, 70% of the core will be refunded.
• If the core is returned after 90 days, 50% of the core will be refunded.
• After 6 months cores will be accepted at UnderDog's discretion.