10. 1970 Buick GSX
The 1970 Buick GSX shattered Buick’s reputation for understated luxury with its bold appearance and fierce performance. Under its refined exterior, the GSX packed a 455 Stage 1 engine, delivering staggering torque and acceleration. This unexpected powerhouse demonstrated that Buick could compete with the best in the muscle car arena, blending sophistication with raw muscle. Discover more about this surprising legend at Hagerty.