Basically, an O – ring is a simple circular gasket. It creates a seal between metal parts – things like exhaust flanges, where sections of your exhaust pipe connect. It’s made of a flexible material, usually some kind of rubber or silicone, so it can compress and fill any tiny gaps. Think of it like a really precise, flexible stopper. In your exhaust, they’re used at joints and connections to prevent exhaust gases from leaking out. These leaks can happen at any place where two pipes or components join. You’ll often find them around the exhaust manifold, where it connects to the engine, and between sections of the exhaust pipe itself. They’re also sometimes used where the exhaust system connects to the catalytic converter. Well, exhaust gases are, obviously, not something you want leaking into your car’s cabin, or even just around the engine. A leaking O – ring can cause a loss of engine power, because the system isn’t properly sealed. You’ll notice if you hear a hissing or chugging sound coming from underneath the car, especially when accelerating, that’s a good sign something is leaking. Plus, those exhaust gases are hot and corrosive – a leak can damage other parts over time. Replacing a worn O – ring is a relatively inexpensive fix that can prevent bigger, more expensive problems down the road. You can find a good selection of them at places like Fixparts Online, and honestly, it’s good to have a few spares on hand because heat and vibrations tend to wear them out eventually. They act like a shield, protecting other parts from damage. Professional-grade support: O-Ring (MPN 18111175311) comes with a 12-month warranty!

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