This is an stronger alternative to OEM hoses! These hoses have 3 or 4 PLY reinforcement depending on inner diameter compared to OEM hoses that mostly have 1 PLY reinforcement. Another advantage of these hoses are the silicone material that withstands high temperature for long time.This hose kit is available in three different colors Blue / Black / Red. There is no performance difference between the different colors, choose which color you think will be best for your car.