K&N XSTREAM PERFORMANCE POWERLID. Stock jetting is not recommended. K&N has taken the guess work out of the equation. These powerlids come with the appropriate main jet for your quad to perform at its full potential with the Xstream Powerlid. Replaces stock airbox lid, snaps in place, and allows increased air flow for more horsepower. Eliminates restrictive intake snorkels. Dyno tested. Main Jet and Precharger Wrap included.