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Summary Hellcat oil catch can helps reduce the amount of oil vapor the PCV system sends back into the supercharged 6.2L HEMI intake. On Hellcat-powered vehicles, that oil can reach the supercharger, charge-air cooler surfaces, and intake tract. Installing an oil separator adds a filtration stage that captures much of that oil before it reaches those components. For stock and modified Hellcats alike, the goal is simple: keep more oil out of the in...