Application: Compatible with Cummins ISX, Caterpillar 3400, and C-15 5.4" Bore. REPLACE OEM: Piston Ring Compressor Tool alternative to the PT-7040. Anti-Polishing Ring Adapter Set for 5.4 IN Bore is alternative for 5299448, 5299447 and 5299339. Kit supersedes 3163058 3163158 3164846. FUNCTION: Assures proper piston installation, reducing the possibility of broken rings. QUALITY: Strong Cast Steel. Ring Compressor help for piston installation. Time & Money saver! SATISFACTION GUARANTEE: .