LS-DYNA 971 (Release 4) revision 2.1 is available for download using the following links. Each operating system section has both MPP, SMP, double and single precision versions available.
ls971_d_R4.2.1_winx64_p.zip
mpp971_d_R4.2.1_Intel_linux86-64_OpenMPI.exe.gz
mpp971_d_R4.2.1_Intel_linux86-64_IntelMPI_hybrid.exe.gz
The following previous versions of LS-DYNA are available: