These 3-foot lengths of aluminized cloth can be pulled over the fuel lines and wiring harness like a long protective sock. Cooler fuel has less chance of boiling and causing vaporlock. Fuel pump cavitation due to boiling fuel is a leading cause of pump death. We also cut pieces of Reflect-A-Cloth to wrap individual components as needed. The fuel pump and bulky wires were wrapped in place with multiple layers of the stuff. Electrical components are more efficient at lower temps, thereby drawing fewer amps from the electrical system. This rig was later romped on for a week in the desert at temperatures far exceeding manufacturer's specifications. We finally burned up a fuel pump relay under the hood, but everything that was protected is alive and well.