Moroso 15-Up Subaru WRX Air/Oil Separator Catch Can - Small Body - Billet Aluminum

This is the Moroso small body air/oil separator catch can, designed specifically for the 2015 and newer Subaru WRX. It's built to help keep your engine's intake system cleaner by capturing oil vapor and blow-by gases that would otherwise recirculate back into the intake manifold. Over time, this oil mist can build up on intake valves and sensors, potentially affecting performance and efficiency.

Constructed from solid billet aluminum, this catch can is well-built and durable. It features a compact design that makes it easier to find a suitable mounting location in the engine bay. The separator works by cooling the blow-by gases, causing the oil vapor to condense and collect in the can, while cleaner air is allowed to pass through. This helps maintain a cleaner intake tract and can lead to improved engine response.

For installation, you'll typically need to refer to the manufacturer's instructions for the specific routing of the hoses and the best placement for the can. It's a popular upgrade for WRX owners looking to protect their engine from oil contamination.