4JJ1 Engine 4JJ1 Cylinder Liner Kit for Dmax Pickup Parts 4JJ1 4JJ1T Cylinder Sleeve Piston Ring Piston Parts This engine component kit is designed for the 4JJ1 and 4JJ1T engine models used in Dmax pickup trucks.It includes cylinder liners, piston rings, and pistons to support complete cylinder assembly replacement or rebuild.The parts are engineered to meet specifications for proper fit and function within the engine block.Suitable for use during major engine overhauls, this kit provides all necessary elements for restoring cylinder integrity and compression performance.