One to Buy: 1 of 1 single owner 1989 Porsche 928 S4 GT Flachbau

One to Buy: 1 of 1 single owner 1989 Porsche 928 S4 GT Flachbau

Introduced two-and-a-half years after the S4 upon which it was based, Porsche’s 928 GT was the sportiest iteration of its V8-powered Grand Tourer yet seen. In addition to a more powerful engine…

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