This book describes about the basic knowledge about the engine cooling fins and it also tells about the changes done in the cooling fins. The model of fins are designed and it is analyzed using CFD.The result from CFD will clearly describe about the changes done in each fin notches. Each test is carried in theoretical and as well as in software, each result are compared and they are discussed. This book also contain a detailed specification , designed model and prototype of the model used in this project.