The Nightrun Garage Lexus IS300 PCV Hoses set contains all (3) PCV hoses that commonly crack due to heat and age. The 1st Gen Lexus IS300 is almost 20 years old so many rubber based parts are hardened and fall apart or crack when doing common maintenance. When these hoses crack, they can cause hard to diagnose running issues! These are common maintenance parts that should be changed when replacing valve cover gaskets or any job that requires removing the throttle body. We include all (3) hoses and they are high-quality Lexus/Toyota parts.