Guaranteed horsepower gain Designed to improve throttle response and engine sound Free-flowing high density polyethylene tube Replaces entire factory air intake system K&N Million Mile Limited Warranty Lasts up to 100,000 miles before service is required (depending on driving conditions) Easy to install, usually in 90 minutes or less Availability: 63 Series Intakes are NOT CARB ApprovEd THE K&N 63-6020 Air Intake fits some Nissan Titan XD models. See vehicle applications link for details. The K&N AirCharger 63-6020 air intake system replaces your vehicle’s restrictive factory air filter and air intake housing. K&N intakes are designed to dramatically reduce intake air restriction as they smooth and straighten air flow. More air means more usable power and acceleration throughout the engine’s RPM range. The 63-6020 air intake comes with a large chrome topped K&N high-flow air filter and a heat shield that mounts onto the inner fender. This allows cooler, denser air to be directed through a custom molded intake tube into the engine’s throttle body for a guaranteed power gain. The oversized air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. When you put a K&N diesel truck air filter to work, you can feel confident that you've got a product specially designed and tested for your diesel's specific engine demands. This air intake is relatively easy to install using commonly available tools, and uses the stock mounting locations to secure it. Additionally, the stock mass air flow sensor mounts right on the intake tube. This air intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards.