A catch can basically collects the oil mist and blow – by gases that your engine produces. Now, all engines have a little bit of combustion leakage – it's unavoidable. These gases get routed back into the intake system normally, but that can cause carbon buildup on your valves and just generally mess things up. The catch can intercepts those gases before they get to the intake, letting the oil separate and drain back down, while venting clean air. Think of it as a cleanup crew for your engine’s emissions system. It sits in the line between the engine’s crankcase ventilation system and the intake manifold. Instead of those oily fumes circulating back into the engine, they get trapped. It's an addition to your existing system – it doesn't replace anything, it enhances it. It helps keep your engine cleaner internally. Carbon buildup reduces performance and can even cause issues down the road. A catch can acts like a shield, protecting your intake valves and preventing that buildup. You’ll notice if things get really bad – rough idling, reduced gas mileage, maybe even a check engine light. It’s preventative maintenance, really. A lot of people running turbocharged engines or doing a lot of short trips find they benefit the most, but honestly, any engine can use one. You can find them easily enough; Fixparts Online has a good selection if you're looking. It’s a relatively small investment that can really help extend the life of your engine. Your trust matters: Catch Can (MPN 6C0937519D) comes with a 12-month warranty!

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