Injen likes to keep things cool, so the air filter is positioned in the best possible location to keep that unwanted hot air from entering your intake. This helps drop air intake temperatures and feed cool, dense air to that hungry engine. This Injen PF intake kit includes everything that is required for a direct-fit installation. Just like all of Injen?s cold air intake systems, this PF Cold air Intake kit includes the unbeatable Injen limited Lifetime Warranty. Rest assured that all of your Injen parts are performing perfectly for as long as you own them!