I had a mad overheating problem with my '06 350z and had 2 different mechanics "fix" said problem. After hundreds of dollars and a still overheating car, I decided to buy this product and install it with a few friends over a weekend. Why didn't I do this first. It, along with the "Mishimoto Performance Aluminum Radiator","Mishimoto Silicone Hose Kit Black", and "Nissan OEM 350Z Thermostat Gasket", I now have a car that only heats up to the lowest operating temperature point. Worth every cent.