K&N air filter cleaning kits come with a filter cleaner and filter oil, which is designed to clean any K&N oiled cotton air filter, restoring air flow efficiency so that it looks and operates virtually like new again. When the dirt on your filter meets or exceeds the wire mesh, it's time to clean it.

Watch how easy it is to install the K&N 69-5321TS performance air intake system for the 2015-2018 Hyundai Sonata and Kia Optima 2.4L. This intake system includes an aerodynamic mandrel-bent aluminum intake tube, oversized washable cotton High-Flow Air Filter, and a custom heat shield. Add performance and protection to your Sonata or Optima with

Traditionally, the only answer to easy cold starts was switching to an aftermarket electronic fuel injection system. But these systems can cost thousands of dollars, be a nightmare to install, and can be impossible to tune if you don’t know what you are doing. Well thanks to the induction experts at K&N, there is another solution.

Can’t find your vehicle’s make, model, or engine size? This video is full of useful tips to help you find the information you need to buy the right air filter.

K&N is the presenting sponsor of the Optima Ultimate Street Car Invitational.

This 1992 F250 prerunner was designed to be the ultimate weekend vehcile for Jason Tidiken

The world-renowned Roadster Shop debuts its latest creation at the K&N Booth 22755 this week during the 2017 SEMA Show. The 1970 Camaro named Split Second was constructed to the usual high Roadster Shop standards of ingenuity and quality.

The world-renowned Roadster Shop of Mundelin, IL cut the unibody of this 1964 Dodge Polara apart and built an entirely new car underneath. This sleeper may not look like much from the outside, but it will surpirse you when you open the hood!

When a customer approached Jake McKiddie, of Phat Phabz, in Oklahoma City, Oklahoma, to build a truck to haul his 1959 Cadillac from show to show, Jake started by cutting up a brand new $75,000 Ford F350 with a 6.7 L Power Stroke Diesel. See what went into this crazy build below!

Bobby Martins from Sadistic Iron Werks explains what went into creating a fully dropped 2017 Audi R8.