K&N 57-1545 Fuel Injection Performance Kit for Jeep Grand Cherokee 5.7L 05- 07 is designed to increase power by as much as 10%. 57 Series FIPK’s are CARB exempt, street legal in all 50 US states, come with a Million Mile Limited Warranty and are guaranteed to increase power. K&N air intake systems replace your vehicle’s restrictive factory air filter and air intake housing. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This translates into more power and torque for your vehicle. The filters on these kits are washable and reusable.