When announced in February 1993, the 911 Turbo 3.6 was to be the highest-performance regular production offering Porsche had ever produced for sale in North America.

This new single-turbo, rear-drive, widebody964-chassis 911 produced a shocking 355 horsepower.

Porsche achieved these eye watering numbers by turbocharging its new M64 3.6-liter engine and swapping out the previous 3.3-liter powerplant.

As the 964-chassis generation drew to a close, Porsche decided to release an even more powerful variant, the Turbo S.

Designed with even higher performance than the standard 911 Turbo, Porsche estimated it would build fewer than 100 of these Turbo S models.

The 911 Turbo S would include the X88 "Works Increased Horsepower" engine with modifications inspired by the Brumos Racing IMSA engine built by Andial, the California-based performance tuner with a record of building race-winning competition cars.

These included a larger KKK turbocharger with increased boost, a more efficient inter...