In fact, a high flow air filter can increase your horsepower by about 3 to 5 HP and also increase your torque. At the same time, this can lead to greater fuel efficiency. The K&N air filter promises to deliver more horsepower, and it did. The Crosstrek produced 164.3 hp and 142.5 lb-ft of torque after the installation of the K&N filter, which allowed the engine to produce 164.42 hp and 142.53 lb-ft of torque.
This was the best performing filter, but it only created 1.1 hp and 1.71 lb-ft more than the cheap aftermarket filter. So how does an air filter increase power? Air resistance can take power away from the engine, so when you replace your original air filter with a high-performance air filter, it will allow cleaner and more air to enter, resulting in improved performance and increased power. The premium air cleaner included in a K&N intake system helps increase airflow by up to 50% compared to a traditional disposable paper air filter, and the intake tube is designed to flow a large volume of oxygen-rich air without the excessive baffles and diminishing components that many factory systems have. When you switch to a high-performance air filter, you'll notice more efficient driving and more power.
The sound improvement is much better and is optimizing the entire intake system rather than just part of it (just the air cleaner). This deep loading capacity is also what makes it possible for the large conical filter included with each inlet to operate up to 100,000 miles before cleaning, compared to a disposable filter that normally needs to be discarded and replaced every 12,000-24,000 miles. From what I've heard from my friends and other online resources, a high-performance air filter should be cleaned after approximately 30,000 miles. What Fenske doesn't prove is how well each aftermarket filter actually filters the air entering the engine compared to the original unit.
However, when you choose between names like K&N air filters, AEM filters and Volant air filters, you can be sure that you get a product that has proven its effectiveness. To add power most effectively with an air filter, you'll want to choose from the best brands in the industry. It can help gain some power (1-5 horsepower) in your car by delivering cleaner, fresher air to the engine. The aftermarket CarQuest filter was truly surprising, as it performed better than the clean OEM filter even though it cost less. In conclusion, an aftermarket air filter can increase your car's horsepower by up to 5 HP and also improve fuel efficiency. It is important to choose from reputable brands like K&N air filters, AEM filters and Volant air filters for maximum performance gains.
Additionally, it is recommended that you clean your high-performance air filter after approximately 30,000 miles.