K&N 99-04 Jeep Grand Cherokee L6-4.0L Performance Intake Kit

If you're looking to get more out of your 1999-2004 Jeep Grand Cherokee with the 4.0L engine, this K&N performance intake kit is designed to help. It works by improving how your engine breathes, allowing more air to enter the combustion chamber. This improved airflow is what helps boost both horsepower and torque, giving your Jeep a more responsive feel.

The kit includes a rotationally-molded high-density polyethylene (HDPE) tube, which is shaped to help increase the volume of air going into your engine. It's paired with K&N's well-known washable and reusable High-Flow Air Filter. This oversized, conical filter uses oiled cotton media and is designed to go up to 100,000 miles between cleanings under normal highway driving. A custom heat shield is also included to help keep the intake air cooler by blocking heat from the engine bay, which is important for performance. K&N backs this system with their Million Mile Limited Warranty.

Installation is typically straightforward and can often be completed in under an hour, making it a popular upgrade for Jeep owners looking for a noticeable difference in performance.