DEI Coupons & Promo Codes for May 2022

Save with these DEI discounts and coupon codes - 8 active codes
  • Sale
    Deal
    Save at DEI
    DEI Dark Heather Gray T-Shirt - Large For $21.95
    Get Discount
    Ends Jul 22nd
25% Off
DEI at Amazon
Save on DEI Items at Amazon
Amazon.com is a third party seller of DEI. See if Amazon is running any deals on DEI.
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DEI on eBay
eBay Sale: Discounts on DEI
eBay often offers DEI at discounted prices through resellers and auctions.
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  • Sale
    Deal
    Save at DEI
    Titanium Knit Exhaust Sleeve - 4" X 36" For $92.21
    Get Discount
    Ends Jul 15th
  • Sale
    Deal
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    Heat Screen™ (Non-adhesive) - 36" By Linear Foot For $86.07
    Get Discount
    Ends Jul 8th
  • Sale
    Deal
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    Only $19.37 For Boom Mat® Prep Spray
    Get Discount
    Ends Jul 1st
  • Sale
    Deal
    Save at DEI
    Just $14.41 For Decoupling Washers - 0.375" Large (10.31mm Id X 31.75mm Od) - 10-pack
    Get Discount
    Ends Jun 24th
  • Sale
    Deal
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    Speaker Baffles - 6" X 9" Oval For $14.55
    Get Discount
    Ends Jun 16th
  • Sale
    Deal
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    Only $12.25 For Speaker Baffles - 6.75" Round
    Get Discount
    Ends Jun 9th
  • Sale
    Deal
    Save at DEI
    Gladiator - Black Original Finish Complete Kit For $414.62
    Get Discount
    Ends Sunday
Unpopular/Expired DEI promo codes
  • 20% Off
    Deal
    Save 20% Off at DEI
    Save 20% Off All Products On Black Friday Sale
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Titanium 4" Knit Exhaust Sleeve - 24" For $67.18
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Just $40 For Dei Titanium Weave Throw Blanket
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Boom Mat® Leather Look Sound Barrier - 24" x 48" (8 sq. ft.) For $117.13
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Titanium Flexible Heat Shield With Trim Ring - 3.5" X 6.5" For $67.14
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    EXO Series™ Protect-A-Boot Ringless Sleeve - 8-Pack For $188.38
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Easy Loom™ Split Wire Sleeve - 0.375" X 20' For $29.80
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Just $9.97 For Radiator Relief™ Cooling System Flush
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Only $10.57 For Speaker Baffles - 5.25" Slim
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Only $180.51 For Stainless Steel Acoustical Floor & Tunnel Shield - 22" x 19"
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Fire Sleeve™ & Tape Kit - 0.625" ID x 36" For $30.15
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Speaker Baffles - 4" X 6" Oval For $11.82
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Boom Mat® Original Finish Headliner - Black 0.5" For $237.85
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Fire Sleeve™ - 0.625" ID x 25' For $166.78
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Boom Mat® Original Finish Headliner - Black 1" For $241.42
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Muffler Shield Kit For $58.97
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Sprinter Van Insulation - Long Wheel Base Kit (350 sq. ft.) For $508.43
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Stainless Steel Heat Shield Pad - 4" x 8" For $81.95
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Boom Mat® Original Finish Headliner - White 0.5" For $237.85
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Only $22.85 For Lite'N Boltz™ LED Accent Lighting - Amber
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Just $18.44 For Boom Mat® Prep Spray
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    '15-'19 Polaris Slingshot SL LE - Heat Control Complete Kit For $253.48
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Only $48.62 For Floor & Tunnel Shield II™ - 21" x 24"
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Titanium™ Protect-A-Boot™ Sleeve - 6" 4-Pack For $45.13
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Decoupling Washers - Assorted Washer Kit For $33.89
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Transfer Adhesive Tape - 3" x 32.8' 2-Pack For $28.69
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Exo™ Series Spark Plug Boots - 2 Pack For $47.10
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Improved Formula Hi-Temp Spray Adhesive For $19.95
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Starter Shield - Ultra 47™ Series For $89.12
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Transfer Adhesive Tape - 3" X 32.8" 2-pack For $28.71
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Only $63.94 For Onyx Flexible Heat Shield With Trim Ring - 3.5" x 6.5"
    Get Discount
    Expired
  • Sale
    Deal
    Save at DEI
    Stainless Steel Pipe Shield - 4.5" x 8.5" For $114.91
    Get Discount
    Expired
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    Get Discount
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    Up to 30% OFF - LED Forward Lighting Bulbs
    Get Discount
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    Up to 40% OFF - Customized Floor Mats
    Get Discount
DEI Promo Codes FAQ
How do I find the latest DEI Promo Codes?

BrokeScholar is a great source for the latest DEI deals. We recommend checking this page for promo codes before checking out at DEI.

I have a DEI Promo Code not listed on BrokeScholar, can you add it?

Of course! Fill out our contact form with the subject line "DEI Promo Code" and include all offer details. Once verified the code will be added to this page.

Why does BrokeScholar list expired DEI Promo Codes?

Occasionally DEI will extend a promotion or reuse a code at a later date. If there are no active codes, try out some expired ones -- they just might work!

Does DEI offer Black Friday and Cyber Monday deals?

Yes, DEI offers Black Friday and Cyber Monday deals. You can find all DEI Black Friday coupons and Cyber Monday deals on BrokeScholar.

More About DEI Coupon Codes and Offers

At BrokeScholar we work around the clock to update this page with active promo codes, coupons and discounts for DEI. Our editors monitor newsletters, social media posts, deal forums, and third party sellers to find the best DEI deals. For students, we also track DEI student discounts for exclusive savings. We've done the research so you don't have to. Bookmark this page and never miss a DEI promotion again.

DEI coupons
Active Coupons:8
Total Sales:40
Updated:Yesterday
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About DEI Discounts

Take a look at our 8 active DEI coupons for May, 2022.

Highest ever DEI discount: Up to 50% Off Wood Marble Water Bottle

Latest DEI Offer: DEI Dark Heather Gray T-Shirt - Large For $21.95

Our coupons save shoppers an average of $20 at DEI.

How to apply Promo Codes at DEI
  1. Select a DEI promo code that fits your order. Click "Reveal Code" to copy the promo code to your clipboard.
  2. Head to designengineering.com and navigate to your shopping cart. Double check the right items are in your cart.
  3. Find the promo code box, paste your code, and click apply.
  4. Review your savings before finishing checkout. The discount should reflect in your order total.