K&N Performance Cold Air Intake System: Easy Installation, Engineered to Maximize Airflow, Boost Horsepower & Torque, 57-7000

Absolutely great bang for the buck. Noticeable boost in power and discernible exhaust tones. This was the awakening that my 2000 911 Cab was anxiously awaiting. Highly recommended.

This upgrade to my 06 Carrera S has been amazing! The sound is truly incredible and it feels like the flat 6 woke up a lot! I highly recommend!!

Installation for this non-mechanic took about 2 hours from opening the box and reviewing the instructions to starting the car and going for a ride. Installed on a 2003 Porsche C4S. Quality of the materials was fine for the job it does. Fit nicely once assembled. Only had to improve on aspect of the heat shield to get the fresh air hose to fit into the deck lid correctly. Add one small hole at the bottom and a small stainless screw into it to help the alignment. Performance wise, I did notice a boost in overall power and throttle response. Seems to have a smoother overall power curve and noticeable improvement over the entire range. Terrific sound about 5K RMP too that is a nice bonus. At normal operating RPMs there is no major changes (which is nice). I would recommend this to anyone looking to improve the performance of their vehicle.