Originally Posted by 2000MTZ
AFE Pro Dry. Does filter better than a K&N
Fixed for you
K&N's range from 96 to 99% filtration efficiency. The Pro dry is consistently +99%. I'd also add the Amsoil nano fiber, Airaid synthamax, and AEM dry to the list of +99 dry filters. The paper filter really isn't as restrictive as many like to think. You'll get 4-10 inches of H20 restriction on a regular paper filter in these trucks, with a "high flow" filter you'll still have around 4-8 inches of restriction. There can be a slight throttle response increase which makes it feel like there is more, but on the dyno the numbers are small with a drop in.