2009 through 2012 Ford Flex 3.5L Gets More Power with K&N Air Intake

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K&N Air Intake Installed on 2009 through 2012 Ford Flex 3.5L
K&N Air Intake Installed on 2009 through 2012 Ford Flex 3.5L
Dyno Chart for 77-2578KS Air Intake System
Dyno Chart for 77-2578KS Air Intake System
The Ford Flex is a full-sized seven passenger crossover utility vehicle (CUV). Its bold exterior design is accompanied by Ford's signature chrome horizontal three-bar grille. The stylish interior, combined with the second and third row seats that fold flat into the floor, make the Ford Flex a desirable buy. With an abundance of cargo space and family-friendly seating, the Ford Flex can be a very practical and convenient vehicle to own.
K&N Air Intake System for 2009 through 2012 Ford Flex 3.5L
K&N Air Intake System for 2009 through 2012 Ford Flex 3.5L


The Ford Flex is said to produce 262 horsepower from its 3.5L V6 engine. There are times, like when passing,  extra power is missed.  K&N has designed a performance air intake system just for those times.  K&N's 77-2578KS air intake fits 2009 through 2012 Ford Flex models with the 3.5L engine. The 77-2578KS is guaranteed to provide more horsepower and increased torque for these models.

K&N's intake system is equipped with a custom tuned intake tube, a K&N high-flow washable air filter (RF-1048) and a heat shield.  This intake system virtually eliminates air path restriction and positions the filter toward cooler outside air.

Dyno testing revealed an increase of 9.19 horsepower at 4914 rpm with the use of this simple performance air intake add-on. Testing also showed a powerful boost of 9.82 lbft of torque. More power and towing ability makes the Ford Flex an even better crossover utility vehicle. 

Complete with images, K&N's installation instructions will guide you through the installation process in a step by step fashion. Installation of the 77-2578KS is typically done in 90 minutes or less. Adding performance to your 2009, 2010, 2011 and 2012 Ford Flex has never been easier.

K&N air intake systems are designed to last the life of your vehicle and come with K&N's Million Mile Limited Warranty.

Find K&N products for your vehicle using the K&N application search then use the K&N dealer search to find a K&N dealer in your part of the world.



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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.

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