Design Engineering DEI 51404 Pre-Cut Thermal Acoustic Trunk Insulation & Damping Kit for 1967-1969 Camaro/Firebird

The Design Engineering (DEI) 51404 (also known as part number 500404) is a pre-cut thermal acoustic insulation and damping kit engineered specifically for the trunk area of first-generation 1967–1969 Chevrolet Camaro and Pontiac Firebird F-body vehicles. Made in the U.S.A., this kit delivers an effective and affordable solution for reducing unwanted heat and noise in your classic muscle car's trunk compartment.

DEI engineered this kit using a proven combination of three complementary materials: D-Mat ultra-lightweight insulation and sound-absorbent material, Under Carpet Lite, and 2mm Damping Material. Together, these layers work to combat road noise, tire noise, and heat intrusion—keeping your trunk area quieter and more thermally controlled.

Key Features:

• Pre-cut pieces designed to fit the trunk area of 1967–1969 Camaro and Firebird F-body cars
• Three-layer material system: D-Mat insulation, Under Carpet Lite, and 2mm Damping Material
• Reduces tire, road, and engine noise transmitted into the trunk
• Minimizes heat transfer from hot exhaust and underbody sources
• Fully illustrated installation instructions included for a no-guesswork install
• Manufacturer Part Number: 51404 / 500404 | UPC: 607078004048
• Made in the U.S.A.

This individual trunk kit is also available as part of DEI's complete Camaro/Firebird interior insulation system, which covers floors, firewalls, headliners, and more. Whether you're restoring a classic or simply upgrading your ride's interior comfort, the DEI 51404 trunk kit is a direct-fit, professional-grade solution built for first-gen F-body enthusiasts.