US Motor Works USTK172 Timing Kit with Water Pump (Subaru H4 1.8L and 2.2L) The kits include new water pump (including gasket(s) and all accessories needed), timing belt(s), tensioner(s), idler(s), and hydraulic tensioner (when applicable) Meets OEM specifications Allows you to replace all the components of the timing system Oem recommend that timing belts should be replaced every 60,000 to 100,000 miles Replacing all the timing belt system components at the same time assures the entire system will operate and perform correctly