KN Filters Volvo S80 4.4 V8 SRF is designed not only to increase the power but also provide excellent filtration. K&N Filters makes over 1,200 different air filters for almost all the vehicles you can imagine. The KN air filter is for every vehicle on the road. These filters can be used again and again as they are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. All you need to do is just simply remove the disposable air filter and replace it with a K&N. You also get an instruction sheet for details in case of any installation troubles. The best part is when you buy a K&N filter it is automatically covered by Warranty and you will never need to look beyond K&N air filter. K&N Air Filters is made to withstand some of the toughest environments which require maximum power and acceleration and allow only fresh air even in the dirtiest and dustiest of roads. The result is an air filter that allows dramatically more air into an engine, is washable and reusable, and will protect your engine for the life of your vehicle.