We proudly produce exceptional quality heat and sound control products for the performance racing industry, powersports, marine, and RV markets. You can trust DEI products to solve your heat and sound control issues. If you have any issues, contact us right away.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). Items with custom cut patterns and/or custom cut lengths of material cannot be returned. Clearance or discontinued items cannot be returned.
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.
Design Engineering, Inc (DEI) can ship to virtually any address in the world. Note that there are restrictions on some products, like aerosols, and some products cannot be shipped to international destinations.
When you place an order, DEI will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Customer is solely responsible for payment of all charges, duties, fees and taxes on freight orders, international orders, or otherwise incurred.
DEI processes orders and ships during hours of normal business operation: Monday through Friday, 9 AM to 5 PM Eastern.
Please also note that the shipping rates for many items we sell are weight-based. To reflect the policies of the shipping companies DEI uses, all weights will be rounded up to the next full pound. Shipping discounts cannot be offered on "oversized" items. This can refer to the overall size of the final packaging and/or the final weight. Please check with the shipping provider of your choice to learn what constitutes an "oversized" item.
International Shipping Disclaimer
Import duties, taxes, and brokerage fees are not included in the product price or shipping and handling cost. These charges are the customer's responsibility as DEI only charges the transportation fee for your order. You are required to check with your country's customs office to determine if there will be additional costs.
The customer is responsible for obtaining information regarding their country's laws, regulations, and restrictions that may apply when purchasing DEI products. By placing an international order (shipping outside of the United States of America) the customer is responsible for abiding by their country's laws, regulations, and restrictions. If product is seized and destroyed by customs, DEI will NOT be responsible for the losses, product, or shipping refunds.
Free Shipping & Limited Time Offers
Limited time offers expires on the date stated at 23:59:59 Pacific Time. If no expiration date is stated, then offers will be valid until removed from the website by Design Engineering, Inc (DEI). DEI reserves the right to end any offer at any time, without notice.
All free shipping orders will be delivered to the shipping addresses provided using either U.S. Postal Service, FedEx or UPS. DEI reserves the right to decide which method is used per order. Free shipping offers exclude international orders and any enhanced shipping options, such as next-day air, second day air, and LTL freight (Less than Truckload) (LTL freight may apply to overweight/oversized items). These offers are limited to in-stock items.
DEI Limited Warranty
Design Engineering, Inc (DEI) believes in maintaining a high level of customer service and satisfaction.
DEI warrants to the original retail purchaser with proof of purchase for warranty determination that its products are free from defects in material and workmanship while purchaser owns the vehicle upon which such product(s) were originally installed. DEI’s obligation under this warranty shall be limited to the repair or replacement of parts that are determined by DEI to be defective, or refund of the products original purchase price, at DEI’s option, of the alleged defective product. We pledge that if at any time you encounter a problem with our products, we will strive to correct the problem in the most timely and efficient way possible, subject to the terms, conditions, and
Limitations contained herein.
This warranty does not extend to damage or defect in the finish of a product or to any product that, in the opinion of DEI, has been misused, damaged by accident, or negligence, altered or modified in any way, installed contrary to DEI’s installation instructions, or repaired by an unauthorized service facility.
DEI makes no warranty for products installed on vehicles used for race or competition purposes.
To make a claim under this warranty or receive service, purchaser must first return alleged defective product to place of purchase for warranty determination within thirty (30) days after purchase. In the event purchaser does not receive satisfaction from the original place of purchase, purchaser must contact DEI and request product return instructions. After receiving an assigned Return Good Authorization number, purchaser must return alleged defective product pre-paid along with original dated proof of purchase sales receipt and a written description of problem to DEI (address below).
NO OTHER WARRANTY, EXPRESSED OR IMPLIED, IS APPLICABLE TO THIS PRODUCT. DESIGN ENGINEERING, INC. (DEI) SHALL NOT BE LIABLE FOR THE LOSS OF USE OF THE PRODUCT, INCONVENIENCE, ACTUAL OR ALLEGED DAMAGES WHETHER DIRECT OR INDIRECT OF ANY KIND, INCLUDING LIABILITY FOR SPECIAL, INCIDENTAL, CONSEQUENTIAL OR PUNITIVE DAMAGES, ARISING OUT OF THE USE OF, OR INABILITY TO USE THE PRODUCT, ACTUAL OR ALLEGED LABOR, INCLUDING THE COST OF REMOVING ANY PART, INSTALLATION, REINSTALLATION, FREIGHT CHARGES, TRANSPORTATION, OR OTHER RELATED CHARGES, OR FOR ANY BREACH OF ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH WOULD OTHERWISE BE APPLICABLE TO THIS PRODUCT.
Some states do not permit limitation or exclusion of implied warranties; therefore, the aforesaid limitation(s) or exclusion(s) may not apply to the purchaser. This warranty gives you specific legal rights and you may also have other rights which may vary from state to state.
Specifications, materials, components, color, finish, model changes, availability, and prices are subject to change without notice.
DEI makes no representation or warranty, express or implied, that its products comply with federal, state, or local emission levels, noise levels, or safety standards. The purchaser assumes all responsibility for such use and compliance.
Many Design Engineering, Inc. products and components are recommended for OFF ROAD Use Only! Check local municipal laws in your area prior to installing any DEI performance products for regulations and enforced legislation. DEI will not be held liable for any incurred fees or penalties while using our products.