Mishimoto products are one of the leading suppliers in the automotive aftermarket. I'm a beginner but I'm mechanically sound and the parts are easy to install and make sense. I installed their radiator and thermostat along with an oil separator and will be installing an oil cooler to complement this and help my engine run better. I have asked several race shops and service advisers about Mishimoto products and they all said kudos and you get what you pay for.