The question posed in the title of this post is one that I’ve seen debated on the ‘net since discovering car-related email lists. Fortunately, a Duramax owner tired of the lack of scientific evidence ...

What's so special about K&N air filters? Time for another upgrade on the trusty Honda CRF250L - Here's my install of a K&N ...

Air filters are among the most important parts of any automobile. It is also one of the easiest components to swap with a performance-focused aftermarket part. Many companies claim that their air ...

Rachel Pizzolato performs a K&N air filter recharge in her 2005 GMC Yukon.

Air filters are one of the easiest and quickest components to swap out for an aftermarket part, and plenty of companies claim their design will increase horsepower, torque, and improve acceleration.