Want more horsepower, better throttle response, and improved acceleration? A Rugged Ridge Air Intake System can boost your performance, while helping you keep extra cash in your wallet. Our polished aluminum mandrel bent intake tube replaces the restrictive factory air box to help improve fuel economy and performance. A black powder coated heat shield separates the filter from engine heat, dirt and debris, as cold air is drawn through a high-flow conical air filter. Unlike other reusable air filters, our dry panel design never needs oiling, which keeps your air flow sensor from being damaged by excess oil! The simple bolt on installation gives you power you can feel, adding up to 10HP and 12ft lbs or torque, depending on application. Improves fuel economy up to 10%. 50 State Legal.. This cold air intake kit from Rugger Ridge has a polished aluminum intake tube. Fits 91-01 Jeep Cherokee with a 4.0L engine.