It’s basically a thin sheet of aluminum, or sometimes a laminated material, used for heat shielding. It doesn't conduct heat away, it reflects it. Think of it like a mirror for thermal energy. It’s designed to protect components from excessive heat radiated from things like the exhaust system, catalytic converter, or even the engine itself. It also helps prevent heat soak, which is when heat transfers to nearby parts and can cause problems. You'll find foil used in a lot of different places. Around the fuel tank is common, to keep fuel from getting superheated. It's also used on brake lines, wiring harnesses, and sometimes even body panels, particularly plastic ones. It's often adhered with a heat – resistant adhesive, and sometimes it's secured with fasteners. It acts like a shield, diverting heat away from anything that could be damaged. If this stuff deteriorates or gets damaged, you’ll notice if it’s serious. You might smell burning plastic, see melted wiring, or have fuel delivery issues. Even before it gets that bad, though, excessive heat can shorten the lifespan of components. Fuel lines can become brittle, wiring insulation cracks, and plastic parts become deformed. It’s a relatively inexpensive part to replace, and doing so can save you from much bigger, more costly repairs down the road. We carry a good selection of this stuff at Fixparts Online, if you’re looking to get some. It's pretty straightforward to install in most cases, but it needs to be properly secured to work effectively. Trusted brand, trusted warranty: Foil (MPN 2K0853878A) is covered for 12 months!

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