Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Shop Design Engineering At Speedway Motors

Design Engineering, Inc. is one of the foremost suppliers of thermal tuning product featuring products for racers, street performance enthusiasts, and hobbyists alike with the DEI titanium exhaust wrap. In addition to supplying the performance aftermarket with thermal tuning products, Design Engineering serves the needs of the powersports, marine, industrial and commercial industry markets the world over.

Featured Products
  • DEi 010491 Quick Fix Heat Tape, 1 x 12 Ft, Black
    DEi 010491 Quick Fix Heat Tape, 1 x 12 Ft, Black
    (Part #35610491)
    x
                High performance Quick Fix Tape bonds to  itself and is self-curing, forming a waterproof permanent seal. It's  ideal for emergency hose repair, non-slip grip surface for tools,  electrical splices and connections, serves as a temporary leak sealer,  and does not leave a sticky residue after removal. Just a few of it's  many uses. 

    Extruded from a special high performance grade silicone compound and engineered at 700psi tensile strength, Quick Fix Tape has insulating capabilities up to 8,000 volts and stretches to three times its length for a simple stretch-and-wrap application. The triangular profile of the tape (the center is thicker than the edges) provides a smooth edge when over lapping tape.

    • Available in 1 in. wide x 12 ft. rolls
    • Withstands temperatures from -60 degrees F (-54 C) to 500 degrees F (260 C)
    • Seal ends of hoses, bundle & wrap wires, weatherproof connections & more
    • Can be applied to wet surfaces
    • Corrosion & moisture resistant
    • Permanent air / liquid tight seal
    • Resists solvents, oils, fuel, acids & chemical spills
  • DEi 050220 Boom Mat Spray On Sound Deadening, 18 oz. Can
    DEi 050220 Boom Mat Spray On Sound Deadening, 18 oz. Can
    (Part #35650220)
    x
                
    Reduce unwanted road noise and deaden vibrations in hard to reach places with Boom Mat's new Spray On sound deadener. Works perfect for trunk interiors, fender wells, undercarriage, body panels, rear quarters, inside door panels, and many more. Boom Mat Spray On also works as a thermal barrier to insulate against unwanted heat. Will eliminate any unwanted sound, vibration, or heat in any vehicle!
    • Reduce unwanted road noise and vibration
    • Won't crack or chip
    • Can be applied in multiple layers
    • Helps prevent rust
    • Paintable in 6 hours
    • Single can will cover approximately 20 sq. ft.
    • Handles temperatures up to 300 F
  • DEi 010405 Heat Shroud Velco    Aluminized Line Sleeving, 1 x 36 Inch
    DEi 010405 Heat Shroud Velco Aluminized Line Sleeving, 1 x 36 Inch
    (Part #35610405)
    x
                Heat Shroud is made from a high temperature  rated glass fiber fabric with an aluminized outer facing. Same as Heat  Sheath but with the added convenience of hook & loop closure design  along the open edges. Without the need of removing one end of connected  wires, cables and hoses, simply wrap Heat Shroud around whatever needs  protection and close edges. 
    • Versatility of fitting diameters ½” to 1-1/4”
    • Protects hoses, cables, fuel and brake lines against heat
    • Convenient hook & loop designed edges
    • Withstands 500°F direct continuous/2000°F radiant heat
    • No need to remove wires and hoses
    • Easily trimed to length
    • Fireproof
    • 1⁄2” to 1-1/4” diameters x 3 foot length
  • DEi 030306 Lite N Boltz LED Bolts, Green
    DEi 030306 Lite N Boltz LED Bolts, Green
    (Part #91068002)
    x
                

    Available in five different colors, these LED stainless steel button head bolts can be used for anything imaginable. These can be used on the interior or exterior and are compact enough to put anywhere. Sold per pair and have 5/16"-18 x 3/4" threads. 12 volt. Has a 9/16" O.D.

    Useful as:

    • Map and gauge lights
    • Indicator signals
    • Step illumination
    • Engine compartment lighting
    • Running boards
    • Truck bed rails
    • Dashboard accent lights

    Product FAQ's (PDF)

  • DEi 050380 Boom Mat Speaker Baffle, 6 X 9 Inch Oval
    DEi 050380 Boom Mat Speaker Baffle, 6 X 9 Inch Oval
    (Part #35650380)
    x
                

    To get the most out of your speakers use these speaker baffles from Boom Mat. They isolate the correct frequency responses while damping reverberation in the sheet metal and panel to frame resonance. This maximizes the performance of your speakers. Boom mats speaker baffles also conform into tight spaces for a professional installation to prevent sounds from moving to unwanted areas like the door panels.

    • 6" x 9" Oval
    • 4-1/2" Depth
    • 10-1/2" Width x 7-3/4" Height
    • Available in 16 different sizes covering the most popular speaker sizes
    • Maximize speaker performance by isolation the correct frequency responses
    • Dampen vibration in sheet metal and panel-to-frame resonance
    • Forms a water tight protective shell to prevent moisture intrusion
    • Improved sound quality
    • Closed cell polyethylene construction
     
     
    Learn more about identifying and solving vehicle noise issues by reading Boom Mat's tech article. Science of Noise. 
     
  • DEi 090400 SPA Turbo Gasket Eliminator & Flange Sealant, 14 Oz.
    DEi 090400 SPA Turbo Gasket Eliminator & Flange Sealant, 14 Oz.
    (Part #35690400)
    x
                
    Seal metal-on-metal gaps up to .050" in size with Spa Turbo Gasket Eliminator. It is a grey anaerobic paste that was developed for the turbo market and after curing is able to withstand high temperatures, high pressure, vibration, and moisture. Gasket Eliminator and Flange Sealant is a product your garage should never be without. It will help complete all projects on time and protect against all kinds of unseen problems that may arise.
    • Seals metal on metal gaps up to 0.050”
    • Cures within 3-4 minutes
    • Bonds to steel, aluminum, brass, and other alloys
    • Form-in-place gasket flexibility
    • Not model-specific; use on all vehicle makes and models
    • Suitable replacement for misplaced or lost exhaust gaskets
    • Head to Exhaust Manifold
    • Manifold to Turbine Housing
    • Manifold to Wastegate
    • Turbine Housing to Downpipe
  • DEi 010127 Titanium Exhaust Wrap, 2 Inch x 50 Ft Roll
    DEi 010127 Titanium Exhaust Wrap, 2 Inch x 50 Ft Roll
    (Part #9101127)
    x
                

    This exhaust wrap by Design Engineering, Inc. is made from pulverized lava rock and can stand 1800 degrees directly or 2500 degrees indirectly. Perfect for those extreme conditions and you don't need to use any spray-on coatings with it. Resists abrasion for longer life.

    • Constructed from pulverized lava rock - titanium-like strength and toughness
    • Reduces underhood temps resulting in cooler air intake for improved performance 
    • Able to handle 25% more heat than conventional wrap
    • Capable of handling more heat than any other wrap found in the market today
    • It’s pliable - no need to wet the wrap when wrapping tubing
    • Will not shrink
    • More resistant to temperature/vibration break-down, abrasions, chemical and hot oil spills
    • Very cool carbon fiber look

    Works best on Stainless Steel headers.

    Instruction Sheet (PDF)

    Frequently Asked Questions (PDF)

  • DEi 010409 Aluminized Heat Sheath Plug Wire Protector, 3/4 x 6, 4-Pack
    DEi 010409 Aluminized Heat Sheath Plug Wire Protector, 3/4 x 6, 4-Pack
    (Part #35610409)
    x
                Aluminized Plug Wire Sheaths are  constructed from high-temperature rated glass fiber material bonded to a  heat reflective aluminized material. Plug Wire Sheaths are an  inexpensive alternative for protecting specific areas on both ignition  wire and boot locations from damaging heat generating sources. 
    • Capable of withstanding 2000°F radiant heat
    • Inexpensive alternative for protecting ignition wires and boots
    • Other uses include protecting electrical wiring, harnesses, hoses, cables & more
    • Easy to install
    • 3/4" diameter x 6" long
    • 4 to a pack

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  • DEi 030305 Lite N Boltz LED Bolts, Amber
    DEi 030305 Lite N Boltz LED Bolts, Amber
    (Part #91068003)
    x
                

    Available in five different colors, these LED stainless steel button head bolts can be used for anything imaginable. These can be used on the interior or exterior and are compact enough to put anywhere. Sold per pair and have 5/16"-18 x 3/4" threads. 12 volt. Has a 9/16" O.D.

    Useful as:

    • Map and gauge lights
    • Indicator signals
    • Step illumination
    • Engine compartment lighting
    • Running boards
    • Truck bed rails
    • Dashboard accent lights

    Product FAQ's (PDF)

  • DEi 050200 Boom Mat Damping Material, 12 x 12-1/2 Inch, 2 Sheets
    DEi 050200 Boom Mat Damping Material, 12 x 12-1/2 Inch, 2 Sheets
    (Part #35650200)
    x
                Please view the product's page for more information
            
  • DEi 010502 Protect-A-Boot Spark Plug Boot Heat Shield, Silver, 8 Pack
    DEi 010502 Protect-A-Boot Spark Plug Boot Heat Shield, Silver, 8 Pack
    (Part #35610502)
    x
                

    Protect-A-Boots are made from a high temperature resistant glass fiber material and treated with a proprietary coating, Protect-A-Boots provide spark plug boot and wire protection from extreme under hood heat.

    • Double-wall construction for added durability
    • Helps prevent burn-through, hardening and cracking of boots
    • Installs in seconds
    • Universal-fits most straight or angled boots
    • Withstands 1200°F direct continuous heat
    • Non-flammable & protects against chemicals & resists water

    Protect-A-Boot Instructions (PDF)

    Exhaust Wrap Frequently Asked Questions (PDF)  

     

  • DEi 010393 Reflect-A-GOLD Heat Reflective Tape, 24 x 24 Inch Sheet
    DEi 010393 Reflect-A-GOLD Heat Reflective Tape, 24 x 24 Inch Sheet
    (Part #35610393)
    x
                Reflect-A-GOLD is a metalized polyamide  polymer laminated glass cloth with a high temperature pressure sensitive  adhesive for use in extreme temperature swing environments. It is  lightweight and easy to apply and remove. 

    Highly effective material for firewalls, fuel cells, engine covers, under hoods, engine compartment, bulk heads, seat bottoms – anything or area that needs protection from heat.

    • For firewalls, bulkheads, engine covers, floors, seat bottoms & more
    • Capable of handling continual temperatures up to 850°F
    • Resists UV degradation for long-term performance
    • Virtually NO clearance needed
    • Adhesive protected by a release liner rated up to 325°F
    • Light weight and flexible-Trim to size
    • Space age polymer material
    • Reflects up to 850°F! Reflecting 80% of heat!
    • Ultra light weight and self adhesive
  • DEi 050371 Boom Mat Speaker Baffle, 6 X 8 Inch Oval Slim
    DEi 050371 Boom Mat Speaker Baffle, 6 X 8 Inch Oval Slim
    (Part #35650371)
    x
                Please view the product's page for more information
            
  • DEi 040200 Radiator Relief    Coolant Additive, 16 oz. Bottle
    DEi 040200 Radiator Relief Coolant Additive, 16 oz. Bottle
    (Part #35640200)
    x
                

    Radiator Relief™ supercharges your radiator by transferring heat more efficiently through the radiator. Similar to the original formula this proven coolant additive will reduce your operating temperature up to 30°F reducing engine wear that occurs during extreme use.

    Radiator Relief™ is also formulated with a corrosion inhibitor that reduces mineral deposits. This is the first additive that maintains pH levels that otherwise fluctuate over time resulting in core damage.

    • Reduces engine temperature up to 30˚F
    • Includes anti-foaming agent
    • Formulated with a corrosion inhibitor
    • No mixing required; just add to cooling system!
    • Reduces pre-existing scale build-up
    • Safe with all alloys
    • Compatible with water and all types of anti-freeze products
    • 100% Biodegradable, Non-Corrosive and Non-Toxic Additive
    • For use in all water cooled engines

    Radiator Relief Frequently Asked Questions (PDF)

    Learn more about how cooling systems work with proper coolant mixture and additives by reading our tech article. Cooling System Principles.  

  • DEi 030304 Lite N Boltz LED Bolts, Red
    DEi 030304 Lite N Boltz LED Bolts, Red
    (Part #91068001)
    x
                

    Available in five different colors, these LED stainless steel button head bolts can be used for anything imaginable. These can be used on the interior or exterior and are compact enough to put anywhere. Sold per pair and have 5/16"-18 x 3/4" threads. 12 volt. Has a 9/16" O.D.

    Useful as:

    • Map and gauge lights
    • Indicator signals
    • Step illumination
    • Engine compartment lighting
    • Running boards
    • Truck bed rails
    • Dashboard accent lights

    Product FAQ's (PDF)

  • DEi 050360 Boom Mat Speaker Baffle, 5 X 7 Inch Oval
    DEi 050360 Boom Mat Speaker Baffle, 5 X 7 Inch Oval
    (Part #35650360)
    x
                Please view the product's page for more information
            
  • DEi 050370 Boom Mat Speaker Baffle, 6 X 8 Inch Oval
    DEi 050370 Boom Mat Speaker Baffle, 6 X 8 Inch Oval
    (Part #35650370)
    x
                Please view the product's page for more information
            
  • DEi 050311 Boom Mat Speaker Baffle, 4 Inch Round Slim
    DEi 050311 Boom Mat Speaker Baffle, 4 Inch Round Slim
    (Part #35650311)
    x
                Please view the product's page for more information
            
  • DEi 050503 Floor/Tunnel Shield II, Heat/Sound Insulation, 4 Ft x 42 In
    DEi 050503 Floor/Tunnel Shield II, Heat/Sound Insulation, 4 Ft x 42 In
    (Part #35650503)
    x
                

    Designed to provide the best possible heat protection in areas where high temperatures are always present and problematic, Floor & Tunnel Shield II limits heat transfer on fire walls, transmission tunnels, floor boards, fuel cells and other areas where heat is an issue.  Floor & Tunnel Shield II provides excellent light weight thermal protection, acts as a guard against track and road debris, and provides sound deadening as well.

    Constructed with an embossed 10 mil aluminum face bonded to 1/8” composite glass-fiber core and backed with a high temp super strong pressure sensitive backing, Floor & Tunnel Shield II withstands up to 1750°F of direct continuous heat. The adhesive side holds past 450°F. Its improved multifaceted modern aluminum surface offers improved reflectivity and rigidity and allows for ease of installation. At only 3/16” thick, this product can be shaped and trimmed for a custom fit and is ideal for minimal clearance areas.

    With a unique and patented finely woven glass-fiber backing, Floor & Tunnel Shield II is the easiest, most cost effective way to control thermal transfer while protecting expensive components and vehicle occupants from extreme heat situations and sound.

    Floor & Tunnel Shield II can be used on any number of surfaces including, metal, aluminum, carbon fiber, plastic, and more. Multiple uses include: fire walls, under hoods, transm

  • DEi 050331 Boom Mat Speaker Baffle, 6-1/2 Inch Round Slim
    DEi 050331 Boom Mat Speaker Baffle, 6-1/2 Inch Round Slim
    (Part #35650331)
    x
                Please view the product's page for more information
            
  • DEi 050218 Boom Mat Installation Roller
    $11.99
    $15.39
    Product Rating: 5.00 Stars
    DEi 050218 Boom Mat Installation Roller
    (Part #35650218)
    x
                Please view the product's page for more information
            
  • DEi 010129 Titanium Exhaust Wrap, 2 Inch x 15 Ft Roll
    DEi 010129 Titanium Exhaust Wrap, 2 Inch x 15 Ft Roll
    (Part #9101129)
    x
                

    This exhaust wrap by Design Engineering, Inc. is made from pulverized lava rock and can stand 1800 degrees directly or 2500 degrees indirectly. Perfect for those extreme conditions and you don't need to use any spray-on coatings with it. Resists abrasion for longer life.

    Works best on Stainless Steel headers.

    • Constructed from pulverized lava rock - titanium-like strength and toughness
    • Reduces underhood temps resulting in cooler air intake for improved performance 
    • Able to handle 25% more heat than conventional wrap
    • Capable of handling more heat than any other wrap found in the market today
    • It’s pliable - no need to wet the wrap when wrapping tubing
    • Will not shrink
    • More resistant to temperature/vibration break-down, abrasions, chemical and hot oil spills
    • Very cool carbon fiber look

    Instruction Sheet (PDF)

    Frequently Asked Questions (PDF)

  • DEi 050216 Boom Mat Blade Lock Knife, Soft Grip
    DEi 050216 Boom Mat Blade Lock Knife, Soft Grip
    (Part #35650216)
    x
                Please view the product's page for more information
            
  • DEi 050501 Floor/Tunnel Shield II, Heat/Sound Insulation, 2 Ft x 21 In
    DEi 050501 Floor/Tunnel Shield II, Heat/Sound Insulation, 2 Ft x 21 In
    (Part #35650501)
    x
                

    Designed to provide the best possible heat protection in areas where high temperatures are always present and problematic, Floor & Tunnel Shield II limits heat transfer on fire walls, transmission tunnels, floor boards, fuel cells and other areas where heat is an issue.  Floor & Tunnel Shield II provides excellent light weight thermal protection, acts as a guard against track and road debris, and provides sound deadening as well.

    Constructed with an embossed 10 mil aluminum face bonded to 1/8” composite glass-fiber core and backed with a high temp super strong pressure sensitive backing, Floor & Tunnel Shield II withstands up to 1750°F of direct continuous heat. The adhesive side holds past 450°F. Its improved multifaceted modern aluminum surface offers improved reflectivity and rigidity and allows for ease of installation. At only 3/16” thick, this product can be shaped and trimmed for a custom fit and is ideal for minimal clearance areas.

    With a unique and patented finely woven glass-fiber backing, Floor & Tunnel Shield II is the easiest, most cost effective way to control thermal transfer while protecting expensive components and vehicle occupants from extreme heat situations and sound.

    Floor & Tunnel Shield II can be used on any number of surfaces including, metal, aluminum, carbon fiber, plastic, and more. Multiple uses include: fire walls, under hoods, transmission tunnels, fl

  • DEi 050113 Under Carpet Lite, Sound Absorbion & Insulation, 54 x 72 In
    DEi 050113 Under Carpet Lite, Sound Absorbion & Insulation, 54 x 72 In
    (Part #35650113)
    x
                Please view the product's page for more information
            
  • DEi 010408 Cool-Tape Heat Reflective Tape, 1-3/8 Inch x 15 Ft.
    DEi 010408 Cool-Tape Heat Reflective Tape, 1-3/8 Inch x 15 Ft.
    (Part #35610408)
    x
                

    Cool Tape is a flexible and super strong self-adhesive thermal insulating tape capable of protecting up to 2000°F of radiant heat. Made of one mil aluminized material bonded to a woven glass fiber heat resistant matting, Cool Tape is a ultra light weight heat reflective solution for wrapping wires, cables, hoses, fuel lines, covering seams and many other uses.

    • Withstands direct heat up to 400°F and 2000°F radiant heat
    • Protects lines, hoses, cables, and more
    • Aluminized and bonded to fiberglass
    • Flexible and easy to apply
    • Strong self-adhesive backing
    • Use to secure panels, seal air boxes, wrap wiring & more

    Cool Tape Frequently Asked Questions (PDF)

  • DEi 050110 Under Carpet Lite, Sound Absorbion & Insulation, 24 x 54 In
    DEi 050110 Under Carpet Lite, Sound Absorbion & Insulation, 24 x 54 In
    (Part #35650110)
    x
                Please view the product's page for more information
            
  • DEi 030301 LED Lite'N Boltz License Plate Lighting Kit, Dome, 4 Piece
    DEi 030301 LED Lite'N Boltz License Plate Lighting Kit, Dome, 4 Piece
    (Part #35630301)
    x
                

    LED License Plate Lighting Kits with their right-angle LED, are extremely efficient and emit a much higher degree of light in a desired location than incandescent lamps. Since there’s no filament that can be damaged, LEDs are incredibly durable-virtually shock and vibration-proof.

    • Meets legal requirements without compromising great looks
    • Made of high-grade stainless steel
    • Offer superior lighting
    • Clear epoxy covered lens-waterproof protection
    • .30MA current, 0.36 watts
    • Lights instantly
    • Perfect for license plate relocation projects

    Note: Four piece kits include two LED’s and two license plate mounting bolts and nuts. Thread Size: 5/16-18 x 3/4” (National coarse thread)

    030301 Lite'N Boltz Instructions (PDF) 

    Lite'N Boltz Frequently Asked Questions (PDF) 

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