STD Piston Kits & Rings Set 93mm 8-97942-985-0 8979429850 Fits for 4JA1 4JA1-T Engine (Pack of 4) This piston kit includes four pistons and matching rings designed to fit 4JA1 and 4JA1-T engines.The pistons are sized at 93mm with standard dimensions for precise engine rebuilding.Each set contains all necessary components for cylinder restoration, including piston pins and retaining rings.The parts are engineered for proper compression and in diesel engine applications.This pack is intended for use during engine overhauls where specifications must be maintained.