The Quick Cool Insulator Kit is designed with Poly-core material sandwiched between two layers of aluminum to reduce heat, providing cooler gas for improved performance, more horsepower, and better throttle response. The Quick Cool Insulator Kit is designed with Poly-core material sandwiched between two layers of aluminum to reduce heat, providing cooler gas for improved performance, more horsepower, and better throttle response. •Designed for 4150-style flanges. •Fits Street Demon, Holley®, and QFT™ carbs. •Eliminates vapor lock, keeping fuel at a constant temperature. •Combination heat shield and spacer doubles insulation value. •Bottom layer of aluminum deflects heat, poly-core middle layer reduces heat transfer, and top layer of aluminum dissipates the heat that gets through. •Designed to fit low clearance applications.