Among the rarest and most sought-after Porsches of its time, the 1994 911 Turbo S “Flat-Nose” combines the best of the classic air-cooled, single-turbocharger, rear-wheel-drive Turbo era with distinctive looks and ultimate exclusivity.

In late 1993, a final batch of 76 uncommitted 911 Turbo coupes was sent to Porsche Exclusive for conversion to "S" specification to punctuate the end of production for the Type 964 generation.

Available in four distinct market variants—X83, X84, X85, and “USA Package”—these special 911 Turbo S coupes all were equipped with the "Works Increased Horsepower X88” air-cooled flat six-cylinder engine.

The X88 engine benefitted from an uprated KKK turbocharger operating with increased boost, a more efficient intercooler, modified cylinder heads with larger ports, increased-capacity fuel injectors, and more radical camshafts with advanced engine timing.

A marked improvement over the standard 3.6-liter M64 911 Turbo engine, the X88 engine produced an addition...