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K&N Ford Mustang Shelby GT500 Aircharger (2007-2009)

K&N Ford Mustang Shelby GT500 Aircharger (2007-2009) - Click to enlargeK&N Engineering has designed a performance air intake system (57-2571) that is street legal in 50 states for the 2007 Ford Mustang Shelby 5.4 liter V8 engine. K&N dynamometer testing shows a 53.71 horsepower gain at 5900 rpm.

in horsepower is the large free-flowing K&N chrome top air filter (RF-1048). The factory air box is restricted in size and restrictive in air flow especially at higher RPMs. K&N designed a larger intake tube that fits nicely under the front stabilizer.

The tube is oval because the throttle body is also oval. This design means the cross section is larger. The 53.71 horsepower gain is also aided by the radius adaptor's design as it smoothly takes the 6 inch flange of the air filter and mates it with the air intake tube.

The heat shield isolates the filter element from the heat of the engine which results in an immediate flow of cooler air for additional power. It takes less than 90 minutes to install this K&N air intake system. This intake will eliminate much of the air path restriction and let your engine breathe freely. K&N air intake systems come with the famous K&N Million Mile Limited Warranty.

K&N-57-2571Regular price: $505.49Sale price: $328.57

Installed - Click to enlargeInstalled

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