The main purpose of this study was to determine the impact responses of the different body regions (shoulder, thorax, abdomen and pelvis/leg) of the ES-2re and SID-IIs dummies using rigid wall impacts under different initial test conditions. The experimental set-up consisted of a flat rigid wall with five instrumented load wall plates aligned with dummy's shoulder, thorax, abdomen, pelvis and knee impacting a stationary dummy seated on a rigid seat at a pre-determined velocity. The relative location and orientation of the load wall plates was adjusted relative to the body regions of the ES-2re and SID-IIs dummies respectively. The load wall forces and dummy responses were primarily evaluated by varying four different test parameters - effect of velocity (initial velocity vs. velocity-time pulse), effect of shoulder engagement (with and without shoulder loadwall plate), effect of initial arm position of the dummy (40 deg. vs. 90 deg), and effect of oblique loading of thorax by rotating the thorax loadwall plate by 15 deg. Further, an attempt has been made to derive the transfer functions between the two dummies for similar impact conditions.