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2011-2014 Ford Mustang GT 5.0L K&N Air Intake Delivers Street Legal Performance

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K&N Air Intake for 2011-2014 Ford Mustang GT

A free-flowing roto-molded HDPE air intake tube & high-flow K&N air filter helps to overcome the restriction found in the 2011-2014 Ford Mustang GT stock air ducting

The Ford Mustang has been synonymous with performance since its introduction in early 1964. The Ford Mustang created a new class of automobile known as the pony car. Its styling became wildly popular and inspired a host of imitators. One of the most highly collectible Mustang models came out in 1968 as the GT/CS or California Special. At the time, California made up roughly 20% of Ford Mustang sales and as such this new California Special edition was built at Ford’s San Jose, California assembly plant and intended for the two California sales districts. The 1968 California Special Mustang proved so popular that Ford reintroduced the GT/CS California Special package for the 2007-2009 Ford Mustang GT. The Ford Mustang has always had strong roots in California, which is why K&N air filters developed an air intake system designed to give Mustang owners a street legal power increase in states like California, and other states adopting California emissions standards.

K&N Air Intake for 2011-2014 Ford Mustang GT

Using the 2011-2014 Ford Mustang GT factory air filter box allowed K&N engineers to retain all factory air intake connections, including stock emissions control equipment

The 57-2578 K&N 2011-2014 Ford Mustang GT 5.0L performance air intake system is a little different from the other available K&N Ford Mustang air intake systems. K&N engineers chose to retain the use of the 2011, 2012, 2013, and 2014 Ford Mustang GT 5.0 stock air box when designing this performance air intake system. Retaining the use of the stock air filter box had several engineering benefits. Retaining the stock air box allowed K&N engineers to increase performance while keeping inlet air temperatures, and air / fuel ratios within factory specifications. Additionally, utilizing the stock air box maintains the use of the factory cold air inlet near the front wheel. Plus keeping the factory air filter box allowed K&N engineers to retain all factory air intake connections, including stock emissions control equipment.

K&N Air Intake for 2011-2014 Ford Mustang GT

K&N intake system number 57-2578 will provide improved engine sound to complement the already pulse raising exhaust note of the Ford 2011-2014 Mustang GT 5.0 Coyote motor

Testing revealed that the factory maze of air intake ducting was a significant source of restriction in the stock air inlet system. Included in 50-state street legal performance air intake system, number 57-2578, is a free-flowing roto-molded HDPE air intake tube which helps to overcome the restriction found in the stock air ducting. Restriction isn’t the only trouble with the stock air intake as it also creates turbulence in the incoming air. The roto-molded black HDPE air intake tube used in street legal air intake, 57-2578, has a smooth and consistent internal circumference for reduced airflow turbulence. Reducing restriction and straightening airflow helps the 2011-2014 Ford Mustang 5.0 V8 engine to breathe easier.

The next step in reducing restriction and improving 2011-2014 Ford Mustang GT performance was to eliminate the restrictive disposable air filter. K&N high-flow air filters provide less restriction than typical paper air filters. This means that K&N replacement air filter, number 33-2431, is able to diminish restriction inherent to using a stock paper air filter. The 2011-2014 Ford Mustang GT K&N Air Filter is designed with K&N’s famous high-flow cotton gauze filter media to help increase airflow while also providing outstanding engine protection. This 2011-2014 Ford Mustang performance air filter is washable, reusable, and can go up to 50,000 miles between cleanings, depending on driving conditions.

Dyno Chart for K&N Air Intake 57-2578 for 2011-2014 Ford Mustang GT

On the dyno, street-legal Mustang air intake 57-2578 produced an estimated additional 10.09 horsepower at 5,379 rpm and 16.21 pound-feet of torque at 4,376 rpm over the stock system

All of the design features of the 50-state legal K&N 2011, 2012, 2013, or 2014 Ford Mustang GT 5.0L performance air intake system work together to deliver increased horsepower, torque, and improved acceleration. On the dyno, 57-2578, produced an estimated additional 10.09 horsepower at 5,379 rpm and 16.21 pound-feet of torque at 4,376 rpm over the stock system. Additional horsepower and torque can come in handy when merging onto a highway, or on a race track. Additionally, K&N intake system number 57-2578 will provide improved engine sound that will complement the already pulse raising exhaust note of the Ford 5.0 Coyote motor.

This 50-state street legal performance air intake system, number 57-2578, is an excellent upgrade for 2011, 2012, 2013, and 2014 Ford Mustang GT 5.0L models. With simple to follow instructions and no need to make any other modifications to the vehicle, this street legal performance intake will make more horsepower available at the push of the pedal. If that weren’t enough, K&N backs its air filters and performance air intake systems with a 10-year/million mile limited warranty. Whether it’s taking a 2011-2014 Ford Mustang GT to the next level of on-track performance or adding some excitement to the daily commute, K&N offers a quick, street-legal, bolt on power increase.

Performance air intake 57-2578 is designed to fit and function properly on 2011 - 2014 Ford Mustang GT 5.0L V8 models.

Find additional Ford Mustang GT air intake upgrades, such as Ford Mustang GT Air Filters & Ford Mustang GT Oil Filters, or even for another vehicle, using the Search by Vehicle tool on KNFilters.com. To find an authorized K&N dealer, please use the K&N Dealer Search function.


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K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since. K&N is a world class filtration company selling air filters, oil filters, and intakes in over 30 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies. For more information, visit knfilters.com.