The K&N 63-2578 is a bolt-on cold air intake built around a roto-molded HDPE intake tube, an enclosed airbox, and an oversized oiled cotton filter. The manufacturer states the kit is guaranteed to increase horsepower and torque, and it positions the enclosed airbox as a way to shield the filter from engine-bay heat. For a 2011 to 2014 Mustang GT 5.0L V8 owner looking for a cold air intake for Coyote engine airflow, the filter is rated to go up to 100,000 miles between cleanings under normal highway driving, which cuts down on recurring maintenance compared with a standard panel filter. The manufacturer says the kit is designed to use the car's existing factory mounting points.
Shoppers searching for a 2011-2012 Mustang GT cold air intake kit, a K&N Aircharger install, or a 5.0 Coyote intake with a washable oiled filter will find this kit's fitment and install details spelled out in the manufacturer's documentation. The manufacturer lists the application as 2011 to 2014 Ford Mustang GT 5.0L V8, so 2011 and 2012 cars are covered. Typical installation takes about an hour with simple hand tools. Owners on user forums have reported a noticeable change in intake and turbo-style sound, but results vary, so confirm fitment against your VIN with the manufacturer before ordering.
The manufacturer lists this kit for the 2011 to 2014 Ford Mustang GT with the 5.0L V8, which includes 2011 and 2012 model years. Confirm your VIN with the manufacturer before ordering.
The manufacturer says the oiled cotton filter only needs cleaning about every 100,000 miles under normal highway driving conditions. Harsher or dustier conditions will call for more frequent service.
The manufacturer recommends that customers do not discard the factory air intake, so keep the stock components in case you need to return the car to its original configuration.
The manufacturer's install sheet rates this as a manageable DIY job that takes about an hour. Plan on a ratchet and extension, a flat-blade screwdriver, side cutters, a T20 Torx bit, 10mm socket, and 3mm and 5mm Allen wrenches. Start by disconnecting the negative battery cable, but note that this erases radio presets and some stereos will ask for an anti-theft code, so write down your settings first. The process includes unhooking the mass air sensor connector, cutting the clamp on the engine pulse hose, and capping the drum fitting the manufacturer provides. Work carefully around the crankcase vent hose and reuse the factory mounting points, since the instructions rely on them for alignment.
