Diesel Tunes Guarantee 

If you are not satisfied with your Diesel Tunes Performance product during the first thirty (30) days after you purchase a new product you may return it to Southcoast Performance Solutions for cash refund (see details below). After 30 days from the date of purchase any defective products will be repaired or replaced at manufacturer’s discretion.

Follow these procedures to obtain your refund:

Contact Southcoast Performance in by phone or email to request a Return Merchandise Authorization number (RMA).

Put the product back in its ORIGINAL packaging which must be COMPLETE as per the explanation below.  Do not apply tape or labels to product boxes.

Include the ORIGINAL sales receipt. Invoices, credit card statements or sales receipts from an online payment service company will not be accepted.  

Write the RMA# on the front of the package - no packages are accepted without an RMA#.  

Return the product to: Southcoast Performance Solutions, 14761 Cool Valley Ranch, Valley Center, CA, 92082. 

Terms and Conditions for 30 Day Money Back Guarantee:

We are not responsible for items damaged by improper use or installation.

All products must be received by our Returns Processing Center within 10 business days of receiving a Return Merchandise Authorization (RMA) number or they may be refused.

The RMA numbers must appear on the SHIPPING BOX.  DO NOT MARK ON THE OUTSIDE OF THE PRODUCT BOX, nor apply tape or shipping labels. 

All items must be returned with original packaging and materials and be in perfect, new condition.

All original wires and connectors must be present on the product. 

Product must include all original packaging, instructions, mounting straps/ties, fuses, posi-tap connectors and any other parts that were included with product when initially purchased.

The Product must not be dirty, scratched, bent, broken or have any cosmetic damage. 

Merchandise, Shipping & handling charges and processing fees are not refundable.  A 10% restocking fee will be applied to all refunds to cover the above expenses.  You are responsible for insuring returns.  Products returned that were purchased during a Free Shipping promotion are subject to having regular shipping charges deducted from any return.Any deviation from the return process outlined above will result in a delay or refusal of your return and an additional restocking fee of up to 30%.  Return must be made within 30 days of purchasing the product.