Review on Optimize Your Hyundai Sonata's Performance with the Revolutionary Chip/Power Programmer - Compatible with 1.6L, 2.0L, 2.4L, 2.5L, 2.7L, 3.0L, and 3.3L Engines - Enhance Fuel Efficiency, Save Gas, Boost MPG, and Amplify Horsepower and Torque! by Kenneth Martin

Installed on my Hyundai Sonata 2012 2.4L GLS. This made a huge difference in throttle response and power delivered to the wheels. I don't think it added 35 hp but it seems like at least 20 or so. Before this installation I already had a K&N Typhoon air intake on the car. I was skeptical about the installation but I'm glad I did it. The difference is huge. For €70 you can't go wrong. Installation was easy. You connect it to the IAT cables. They are located on the throttle body closer to the engine. You should see a 4 wire connector, the wires you are looking for are green and black. The company responded to the email within 24 hours and explained exactly which cables to connect. Anyone can do this setup within an hour.