67-72 GM C/K 10-30 Serie s Truck Full Insulation

The Flatline Barriers 67-72 GM C/K 10-30 Series Truck Full Insulation kit is a comprehensive heat and sound barrier system engineered for classic GM fullsize trucks from 1967 to 1972. This pre-cut, ready-to-install thermal insulation combines aluminum and foam construction to reduce underhood temperatures and cabin noise, addressing the thermal management and comfort issues common in vintage truck restoration and hot rod builds.

The kit features a low-tunnel design tailored specifically to the firewall geometry of first-generation C/K series trucks, with a silver aluminum facing and black foam backing. The aluminum reflective layer works by bouncing radiant heat away from the cabin, while the foam layer provides sound dampening and additional thermal resistance. Measuring 24 × 38 inches with a 3-inch profile, the full insulation coverage spans the complete underhood cavity without requiring trimming or custom fabrication. At 8 pounds, the kit adds minimal weight while delivering measurable reductions in engine bay heat transfer and road noise—critical improvements for extended driving in hot climates or during high-performance use.

This insulation is ideal for owners restoring or modifying 1967–1972 Chevy and GMC C10, C20, C30, K10, K20, and K30 trucks who need authentic heat management without modern materials that would compromise originality. The pre-cut fit eliminates guesswork during installation, making it suitable for both professional shop work and owner-level projects. Classic truck builds benefit from reduced underhood temperatures that improve cooling system efficiency and engine longevity, while the sound dampening enhances cabin comfort during highway cruising or show events.