More Air for More Power. Installing a RedRock 4x4 Cold Air Intake on your 2009-2013 5.3L V8 powered Chevrolet Silverado 1500 is an excellent way to improve its power and performance. By replacing your Silverado's restrictive factory intake with a high flow filter assembly you will see and feel a noticeable increase in rear wheel horsepower and torque. Not only will this RedRock 4x4 Intake improve airflow for an increase in power, but it will also add a show winning appearance to the engine bay with its brightly polished aluminum intake tube.No Tune Required. RedRock 4x4 engineered their Cold Air Intake to improve the performance of your Silverado without the need of reprogramming the computer. By utilizing flow dynamics, this Intake will increase power using the original factory tune. Even though a re-tune is not required for operation, We recommend a custom tune to reprogram the vehicles computer (ECU) to get the best possible performance from this Cold Air Intake.Reusable Air Filter. The included high flow air filter effectively filters out power robbing particles with its multi layer design. The specially treated media creates a sticky surface to capture microscopic contaminants before they can enter your Silverado's engine and do harm. Seeing that the filter is reusable there is no need to buy a new filter every few thousand miles. You can just clean the filter, re-oil it, and reinstall - saving yourself money in the long haul.Simple Bolt-on Installation. RedRock 4x4 designed their Cold Air Intake kit to be a direct bolt-on replacement. With no special tools or extra modifications required installation can be completed in under an hour. All parts and detailed instructions are included.Not CARB Certified. This RedRock 4x4 Cold Air Intake is not CARB certified, therefore it is not legal for use in California or other states adopting