95 - 96 - 97 changes??

What did Mitsubishi change in the gsx in years 95 to 96 and to 97. I know the 97s have more torque but do they still have the same engine as the 95/96. What was done for the increase and does anyone know how much it was? What exterior stuff changed in 97.

Engine is the same, body style was changed in 97, front bumper, sideskirts, and rear bumper. Wheels changed. Those are the only changes I know of.