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Includes hoses needed for hookup. This is a sandwich style heat exchanger that circulates engine coolant through the adapter to cool your oil at the oil filter location.
Recommended for street users with boost added to 2006 to 2008 Miatas. Mazda added this as a standard factory installed item for all 09+ MX5s (though in some markets it was offered earlier on some models). Note this is a Mazda factory item and therefore does NOT include instructions because it assumes a dealer with service manual will be doing the installation.