Promotions & Sales

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.

Save BIG with DEI’s end of summer Labor Day Sales Event. Get 20% off all your favorite DEI products from 8/28 through 9/2. Get even deeper discounts on select products like our new ATAC and ATAC Spray Gun at $159.99 when purchased together (a savings of $67.99 off MSRP), a special low price of $8.99 on our new License Plate Pad 2-Pack (Part 50941, a savings of $4.00 off MSRP), and get 30% off MSRP for all Turbo Shield Kits. 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.

Celebrate summer with DEI’s Kickoff To Summer Sales Event. Shop and save 20% on your favorite DEI products from 5/23/24 through 5/27/24. Items with special pricing are discounted deeper than the 20% sale discount. All HT Silicone Spray (Part #’s 10301, 10302, 10303) and Boom Mat Spray (Part#50220) are on sale at $9.99 each. The promotion, Buy a bottle of Radiator Relief (Part#40200) or Radiator Relief for Diesels (Part#40204), Get a Free Bottle of Radiator Relief Flush (Part#40202), a $14.99 value, is limited to one unit per cart. The site wide 20% savings does not apply to items with special pricing or items on clearance. The final sale value will be reflected in your cart total upon checkout. Other exclusions apply. This sale may not be combined with other offers. No product substitutions are permitted, and the retail value of free goods may not be applied towards the sale price.