DEI

Design Engineering, Inc. (DEI) specializes in advanced thermal and acoustic management solutions for automotive, powersports, and industrial applications. For decades, enthusiasts and professionals have trusted DEI products to control heat, protect components, and reduce unwanted noise — improving both performance and comfort without compromise.

This collection brings together DEI’s core product lines, engineered with proven materials like woven silica, basalt fiber, and reflective mylar. Whether you’re building a dedicated track car, restoring a classic, or simply looking to preserve critical wiring and hoses, DEI offers reliable, easy-to-install solutions.

  • Exhaust wraps and tapes — manage under-hood temperatures and improve exhaust flow
  • Heat shields and sleeves — reflect radiant heat away from intakes, fuel lines, and electronics
  • Floor and firewall insulation — reduce cabin heat and road noise for a more comfortable ride
  • Sound damping materials — kill panel resonance and block airborne noise
  • Accessories — clamps, ties, and tapes for a clean, secure installation

Every product is built to withstand harsh under-hood conditions while remaining straightforward to install. From fiberglass header wrap to formable heat barriers, DEI gives you what you need to manage heat and sound exactly where it matters.

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DEI Titanium 10705 8-cylinder kit featuring 8 woven lava rock spark plug boots and 25 feet of heat-resistant wire sleeving.

$238.17

Out of stock
DEI RFI Shield 1/2-inch non-adhesive shielding tape with 17.5-inch grounding strap and silicone finishing tape.

$41.42

In stock
DEI RFI Wire Mesh Shield Tape roll with included grounding strap and Quick-Fix finishing tape

$38.67

Low in stock
DEI Vapor Block 3/8 inch heat shield sleeve with split design and adhesive flap for fuel line insulation.

$16.43

In stock
DEI Easy Loom Master Kit containing various sizes of black split wire sleeving, heat shrink, zip ties, and tools.

$156.63

In stock
Black DEI Easy Loom split wire sleeve showing the braided P.E.T. monofilament texture and split design

$33.17

Out of stock
DEI 1/2 inch ID x 3 feet Titanium Protect-A-Sleeve woven heat protection sleeve for wires and hoses

$19.94

Low in stock
Black Titanium thermal sleeve with 1-inch inner diameter and 36-inch length for automotive wire and hose protection.

$38.81

Low in stock
DEI 10529 Universal Muffler Shield Kit featuring a 42x24 inch dimpled aluminum shield and stainless steel locking ties.

$86.05

Low in stock
DEI Form-A-Shield 21x48 inch dimpled aluminum and basalt thermal barrier sheet for high-temperature exhaust applications.

$107.04

Out of stock
DEI Form-A-Shield 42in x 48in dimpled aluminum and basalt thermal barrier mat without adhesive backing

$204.00

Low in stock
Roll of black DEI Quick Fix silicone self-fusing tape, 1 inch wide by 12 feet long.

$15.61

In stock
Silver reflective DEI heat shroud sleeve with a hook-and-loop closure for oil cooler lines.

$28.03

In stock
DEI 10487 Heat Shroud 3ft aluminized glass fiber sleeve with hook-and-loop closure for 2.5-inch diameter lines.

$55.32

In stock
Gold metalized polyimide air tube heat shield cover with hook and loop closure for 3 to 4 inch diameter intake pipes.

$97.25

In stock
DEI aluminized mylar and fiberglass hub and rotor cover for heat and dust protection

$88.85

Low in stock
DEI Cell Saver battery insulation kit including thermal wrap material and acid neutralizing base mat

$31.85

In stock
DEI Fire Wrap 3000 thermal insulator sleeve with hook and loop closure for 1-1/2 inch diameter hoses.

$95.16

In stock
DEI Fire Wrap 3000 silver thermal insulation sleeve with black hook and loop closure showing 1 inch internal diameter.

$75.39

Low in stock
DEI Fire Wrap 3000 thermal insulator sleeve with hook and loop closure for 5/8 inch hoses and wiring.

$69.47

Low in stock
Black roll of DEI Fire Tape 1-inch self-vulcanizing silicone rubber insulation tape

$54.50

Low in stock
DEI 1-inch ID silicone-coated braided glass Fire Sleeve with 16-inch black finishing tape

$47.97

In stock
DEI 3/4 inch ID orange silicone-coated fire sleeve and roll of black self-adhering fire tape.

$34.55

Low in stock
DEI 5/8-inch red silicone-coated fiberglass fire sleeve with black self-adhering finishing tape

$33.56

Out of stock
DEI 3/8 inch I.D. Fire Sleeve and black Fire Tape kit for automotive heat insulation and hose protection.

$26.85

In stock
DEI Cool-Tape 2 inch by 30 foot roll of aluminized heat reflective self-adhesive tape

$47.78

Low in stock
DEI aluminized Mylar dyno strap heat guard sleeve measuring 5 inches wide by 3 feet long.

$38.80

In stock
DEI Reflect-A-Cool 24x24 inch aluminized fiberglass heat shield sheet with self-adhesive backing.

$31.21

Low in stock
DEI Reflect-A-Cool 12x24 inch aluminized fiberglass heat reflective sheet with self-adhesive backing

$25.31

In stock
DEI Reflect-A-Cool 12x12 inch aluminized heat reflective sheet with self-adhesive backing

$13.97

Low in stock

Can’t Find the Part You Need?

Our catalog represents only a portion of the automotive products available through our supplier network. If you cannot find a specific part, brand, or application on our website, submit a request below, and our team will help source it for you.

Please include as much information as possible, such as your vehicle's year, make, model, trim, engine, desired brand, or part number, to help us quickly identify the correct product.

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