A GM Eaton M45 supercharger kit was also offered for the Z24 trim as well. The supercharger kit was developed and tested by General Motors and could only be installed at a GM dealer. This upgrade increased performance considerably due to a pressure of 4.7 PSI which in turn added approximately 40 hp (30 kW) and 40 lb⋅ft (54 N⋅m) of torque increase; raising the Z24's ratings to approximately 190 hp (142 kW) and 195 lb⋅ft (264 N⋅m) of torque.