71-73 Ford Mustang Coupe Trunk Insulation Kit

The 71-73 Ford Mustang Coupe Trunk Insulation Kit by Flatline Barriers is a factory-engineered thermal and acoustic solution designed specifically for second-generation Mustang coupes. If you've owned a classic muscle car, you know that heat transfer through the trunk area significantly impacts cabin comfort and engine bay temperatures, especially during highway driving or summer months. This pre-cut insulation kit eliminates guesswork by conforming perfectly to the 1971–1973 Mustang trunk geometry, providing a direct factory-replacement approach to thermal management that modern restorers and enthusiasts demand.

This kit combines aluminum foil facing with closed-cell foam backing to create a dual-barrier system that reflects radiant heat while dampening vibration and road noise. The aluminum layer acts as a radiant barrier, bouncing heat away from the cabin, while the foam absorbs acoustic energy generated by the fuel tank, suspension components, and wheel well. At just 2.03 lbs with compact dimensions of 17 x 3 x 30 inches, the kit installs without adding significant weight to your vehicle—a critical consideration for anyone tuning or modifying their Mustang's performance characteristics. The silver and black color scheme maintains factory aesthetics if the trunk lining is removed for detailing.

This insulation kit is ideal for classic car restorers, weekend drivers, and serious Mustang enthusiasts who refuse to compromise on authentic fitment or thermal efficiency. Installation requires only basic tools and approximately one hour, making it accessible to DIY mechanics without specialized training. The pre-cut design ensures no material waste and eliminates the need for custom fabrication or trimming. Whether you're restoring a stock 1971, 1972, or 1973 Mustang coupe or upgrading a modified example, this Flatline Barriers solution delivers measurable improvements in cabin temperature stability and trunk area sound deadening without compromising originality or requiring permanent modification.