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Is it worth fitting a Catch Can to a diesel engine?

There is a company promoting the advantages of fitting a Catch Can to motors that are common-rail diesels. Could you please advise if this is a worthwhile fitment and what are the advantages that can be gained from such fitment? The advertised price of these is around $295.00.

It’s a fad and it might even affect your warranty because it interferes with the factory ventilation system on the engine.

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