The modern LT franchise began with this car, the 675LT. The first modern McLaren, the MP4-12C, was sometimes derided for being composed to the point of being dull, and the 675LT handily disposes of that notion. Weighing a svelte (by modern standards) 2,700 pounds dry and producing an appropriately sinister 666 hp, the rear-wheel-drive, hydraulically-steered 675LT is a firecracker, not just by the numbers, but also how it goes down the road. Compared to the 650S from which is derived, the 675LT has performance upgrades to every meaningful system: faster steering, revised suspension, 40% more downforce thanks to a new rear diffuser and an enlarged front splitter and rear wing, and some 220 pounds of weight reduction thanks to a host of changes ranging from more extensive use of carbon fiber to thinner glass and lighter wheels and lug nuts. As promised by the name, the tail is 1.3 inches longer than the standard car’s, and the rear end restyled as a result. The 8,500 RPM engine gains 25hp thanks to revised turbochargers, a new crankshaft, a titanium exhaust system, lighter connecting rods and camshafts, the latter of which also improve responsiveness. The net result is thrilling and edgy car with a hardcore track-oriented personality that makes any memory of the civilized McLarens which preceded it disappear very quickly. And with only 500 examples built, the already tasty details of the 675LT become even more intriguing. Unless of course one is considering the Carbon Series cars, which feature entirely carbon fiber bodywork, of which just 25 examples were built.