The 2026 Porsche 911 GT3 S/C has been unveiled, offering buyers the high performance of a GT3 model in a convertible body for the first time.It can be ordered now ahead of first deliveries later this year, and is priced from $588,500 before on-road costs.Like the Porsche 718 Spyder is to the Cayman GT4, the S/C borrows the 911 GT3’s powertrain and chassis – though the company says...