The structure is carbon fiber. The twin-turbo V8 making 612 horsepower has only 3,384 pounds to move. It’s so exclusive you may never see one in person. A true canyon carver, the McLaren GT is the most practical car the company makes, versatile enough to haul a set of golf clubs. But no, it won’t replace your SUV or minivan. It remains a McLaren and that means it’s different from anything else out there. Tom Voelk checks out a 2021 model