The COBB Big SF Intake is now available for the 2015-2016 WRX 6MT and CVT vehicles! The Big SF Intake for the 2015-2016 Subaru WRX is constructed of full 3″ aluminum tubing, a custom aluminum airbox, and a dual cone intake filter. Mandrel bent and powder-coated black, the 3″ intake tube and custom airbox look great in the engine bay and increase airflow potential substantially. The reusable Green filter can be cleaned and re-used for the life of your vehicle.
Replacing the factory intake and airbox with the COBB Cold Air Intake will greatly reduce pre-turbo restrictions. When a restriction is removed, it allows the engine to be more efficient while also enabling it to make more power! But, don’t forget that changing your WRX’s intake will require custom tuning. This is because the MAF (Mass Air Flow sensor) uses a sensitive setup that is specifically calibrated for the stock intake from the factory. It’s so sensitive, even filters not shielded from the cooling fan can cause erratic readings. These events have been more pronounced on the 2015+ WRX. The airbox comes as a part of the intake to prevent turbulent air from causing erratic readings. COBB has you covered with the Big SF intake and provides Off The Shelf maps for your 2015-2016 WRX! There are also Stage1+Intake and Stage2+Intake Power Packages available!
Check out the video and description below of how your MAF sensor works for more explanation.
A MAF sensor’s job is to provide the ECU with a reading of how much air is going into the engine. This works through some basic parts and principles. Let’s first think back to high school physics and Ohm’s Law. It states that I=V/R where I is current, V is voltage, and R is resistance. The MAF heats an element in the intake stream to a specific temperature and works to hold it constant. As air flows around this element, it cools. The more airflow, the more cooling. Based on the amount it cools, the resistance in the element drops. As that happens, the current increases and is translated into a voltage change. The car’s ECU uses Ohm’s Law to interpret this voltage change and calculates the incoming air. It then determines how much fuel to inject based on this incoming airflow.
Any differences in the filter element, changes in tubing bends, or different diameter piping can change how air passes over the MAF sensor. This can cause an unintended voltage reading to the ECU resulting in an improper amount of fuel being injected. If any of these changes are present, the MAF sensor must be properly re-calibrated to “see” those changes. If you run an intake for which the mapping is not properly designed, the car could potentially run dangerously lean(or rich) and stumble throughout the rev range.
Get the Big SF Intake and a Stage Package!
Product Code: SUB0040W1P
Product Code: SUB004RW2P
Product Code: SUB004NW2P