B16A3= 94-97 Del Sol like they said. It wont be as fast as it was originally with the B18C1. To Compare
B18C1-170hp 128lb-ft torque
B16A3-160hp 111lb-ft torque

I also wonder what transmission you have. If you have a GSR transmission it will be slower yet. Chances are they just swapped an entire del sol drivetrain with a B16 trans. with the shorter ratios.