04-07 Yamaha Rhino Fan Shroud Add airflow to your existing radiator and increase the cool down time by 100%.This shroud increases the surface area that air is pulled through by 100%.With the testing we have done we have found that with this shroud the fan will run half as long to achieve the temperature set by the fan temp sending unit.That is right if your fan normally runs for one minute to satisfy the sending unit it will run for 30 seconds. What this means is that when your out riding and your fan kicks on it can cool the radiator in half the time. By cooling it down faster it will be able to cool it more effectively.Thus helping you to maintain cooler temperatures in hotter conditions. We have found with this shroud in many stock applications people have resolved a lot of the overheating issues completely.Any further questions give us a call @ 866-375-9717 or visit our website tcpperformance.com To see a demonstration video on this product click here on youtube. For your more extreme modifications we build a triple pass aluminum radiator for this application and the 08-10.