9Y9889LK Liner Kit Fits Caterpillar 9Y9889 3406B 3406COne New Aftermarket Replacement Piston and Cylinder Liner Kit Fits Caterpillar (Fits CAT) 3406B and 3406C Engines This aftermarket piston and cylinder liner kit is designed for in frame or out of frame engine rebuilds on Fits Caterpillar 3406B and 3406C diesel engines. The kit restores proper compression, combustion sealing, and cylinder bore geometry by replacing worn pistons and liners in the engine block. Kit Includes Cylinder liner(s) Piston(s)