there is no difference whatsover.....it is excately the same part number ..1000 % positive on that one.....i have a turbo in my 4g64 with forged JE pistons....so i was thinkin' of changind rods but since they are excat the smae part number ...therefore smae excact rods - they can sustain about 350 hp or 20 psi....TRUST ME ON THAT ONE...