2008, 2009, 2010, 2011 & 2012 Subaru Impreza WRX STi Gains Estimated 17 HP with K&N Air Intake

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K&N Cold Air Intake Installed on 2008 Subaru Impreza WRX STi 2.5L
K&N Cold Air Intake Installed on 2008 Subaru Impreza WRX STi 2.5L
Dyno Chart for 2008-2012 Subaru Impreza WRX STi 2.5L
Dyno Chart for 2008-2012 Subaru Impreza WRX STi 2.5L
The Subaru Impreza WRX STi is known for its impressive performance, safety and comfort. It offers a wider rear track and an improved brake pedal feel. The new underbody also adds stability at higher speeds. Standard all-wheel drive, turbocharged engine, aluminum suspension, 18-inch alloy wheels and aggressively designed sport seats make the Subaru Impreza WRX STi a fun and attractive car to drive.
K&N Air Intake System for 2008, 2009, 2010, 2011 & 2012 Subaru Impreza WRX STi 2.5L
K&N Air Intake System for 2008, 2009, 2010, 2011 & 2012 Subaru Impreza WRX STi 2.5L


K&N has developed an air intake system, part number 69-8005TWR for the 2008, 2009, 2010, 2011 & 2012 Subaru Impreza WRX STi with a 2.5 liter engine. K&N dynamometer testing shows an amazing 17.52 horsepower gain at 5260 rpm.

The 69-8005TWR features an aluminum intake tube with a powder coated wrinkle red finish and a K&N carbon fiber top cone shaped universal air filter, part number RP-5113.

The K&N washable and reusable air filter is isolated by a heat shield to help direct fresh outside air to the engine. The filter captures harmful particles, provides low restriction and also increases filter service life compared to the OEM air filter.
2010 Subaru Impreza WRX STi
2010 Subaru Impreza WRX STi
It will perform for up to 100,000 miles before service is required depending on driving conditions.

The impressive horsepower gain is also aided by the radius adaptor’s design as it smoothly takes the 5 inch flange of the air filter and connects it with the intake tube.

The high-flow technology invented by K&N provides a great balance of airflow and filtration. Designed to be installed with simple hand tools in 90 minutes or less, this K&N air intake system is backed by the K&N 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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