Optional: The use of an Airflow controller / "piggy-back" ECU controller to adjust air/fuel ratios can further optimize HP & Torque with dyno tuning.URD MAF Sensor Calibrator Here are before/after videos testing 0-80mph!0-80mph with STOCK AIR INTAKE: 0-80mph with GEN2 COLD AIR INTAKE (untuned, No MAF Calibrator): CLICK HERE FOR INSTALLATION INSTRUCTIONS INSTALLATION INSTRUCTIONS: TIP! Install will be easier if you have a ratcheting 11mm wrench for the t-clamps. SAFETY FIRST: Disconnect and Remove the battery from vehicle and remove plastic tray underneath. Put on your gloves and using a utility knife, trim approximately 2 inches from the left side of the tray (part facing the engine). Now, remove the entire factory air intake system.