AISIN's Water Pump/Timing Belt Service Kit is the 'common sense' combo as these components should always be replaced at the same time regardless of which component is in need of replacement. The work involved in replacing one of these components is about the same as replacing all of them - save yourself time and money in the long run by replacing all components at the same time. AISIN's kit includes OE matched components, just like the ones your Subaru left the assembly line with - no generic parts here, just the brand names you know and trust - AISIN, Toyo, NTN, and more. AISIN is the number 1 OE manufacturer of water pumps in the world. Each pump features an advanced aluminum die cast housing and premium internal components w/carbon ceramic seals for superior durability and performance. Kit includes OE matched components: Water Pump, Timing Belt, Tensioner, 3 Idler Pulleys, Gaskets, O-Ring, and Installation Instructions - all packed in one convenient box, ready to install. Founded in 1965 to produce original equipment automotive parts, AISIN has grown into a 25+ billion global enterprise with approximately 70,000 employees worldwide. Superior products through engineering excellence, progressive technological development, and dedication to service are some factors which have contributed to bringing AISIN to its position as a multiple-award-winning global leader in automotive parts.