DEI Heat & Sound Control Products

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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.

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.

DEI

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