2009 to 2012 Audi A4, A4 Cabriolet & A4 Quattro Owners Gain Estimated 13.5 HP with K&N Air Intake
K&N continues to improve vehicle performance through its continuous production of new air intake systems guaranteed to increase horsepower and acceleration. K&N's air intake for 2009, 2010, 2011 and 2012 Audi A4, A4 Cabriolet and A4 Quattro models with a 2.0 liter engine is just another example of K&N's dedication to outstanding performance. The Audi A4 is an entry-level luxury car with elegant styling and sharp handling. The 2.0 liter engine however, lacks the power one would expect from such a prestigious car. K&N product developers looked at the restrictive factory intake setup of the Audi A4 and immediately knew they could achieve more horsepower. "Along with a body change in 2009, the Audi A4 air box was also relocated," said product manager Bert Heck. "We had to start from scratch. Our ultimate goal was to get as much power out of the vehicle as we could without affecting the drivability of the vehicle. Older A4 model designs made doin