Alfetta GT un GTV6

Callaway GTV6 Twin Turbo (ouch)

Thirty examples were built between 1983 and 1986. In addition to numerous small component upgrades, the Callaway GTVs included a much revised suspension, larger brakes and a twin-turbocharger system, boosting performance to near-exotic levels.

The car's performance caught the attention of Dave McLellan, Chief Engineer of the Corvette, and would lead to the Callaway-Corvette association it became famous for.