Ringbrothers just debuted Invadr, a 1987 Buick Grand National Restomod. Its twin-turbo V-6 makes 1,246 horsepower, about ...

Ringbrothers transformed a 1987 Grand National with a twin-turbo V6 pushing 1,246 hp and 1,000 lb-ft of torque. This custom muscle car features a Roadster Shop chassis, Penske shocks, and Brembo ...

Grand Nationals are cool ... for the 2-door Wankel sports car. Turbo models were fitted with a staged turbocharger system that used two different compressors to boost power across the entire ...