Promotions & Sales

Bring on the heat with DEI’s Memorial Day Sales Event. Get 20% off all your favorite DEI products from 5/22 through 5/27. Enjoy a special low price of $9.99 when you buy two or more bottles of Radiator Relief or Radiator Relief Flush (Part 40200 or 40202, a savings of $5.00 off MSRP per each). Buy one bottle of Improved Formula Hi-Temp Spray Adhesive (Part 10492), get a second added to your cart automatically for free. No product substitutions permitted. This sale may not be combined with other offers. Exclusions to all sales offers may apply. Clearance items are already marked down significantly and do not qualify for any additional discounts.

Save BIG with DEI’s Black Friday Sales Event. Get 20% off all your favorite DEI products from 11/28 through 12/2. Enjoy a special low price of $9.99 on bottles of Heater Hotter (Part 40206, a savings of $5.00 off MSRP). No product substitutions permitted. Orders over $100 receive a free DEI logo hat (Part 70304); the hat will be automatically added to your cart once the cart value is over $100 after the 20% discount has been applied. This sale may not be combined with other offers. Exclusions to all sales offers may apply. Clearance items are already marked down significantly and do not qualify for any additional discounts.